697559040 has 360 divisors, whose sum is σ = 2589456870. Its totient is φ = 179601408.

The previous prime is 697559021. The next prime is 697559047. The reversal of 697559040 is 40955796.

It is a happy number.

697559040 is a `hidden beast` number, since 6 + 97 + 559 + 0 + 4 + 0 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 571401216 + 126157824 = 23904^2 + 11232^2 .

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×697559040² = 973177228571443200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (697559047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 24053746 + ... + 24053774.

Almost surely, 2^697559040 is an apocalyptic number.

697559040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 697559040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294728435).

697559040 is an abundant number, since it is smaller than the sum of its proper divisors (1891897830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697559040 is an equidigital number, since it uses as much as digits as its factorization.

697559040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 39 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The square root of 697559040 is about 26411.3430177263. The cubic root of 697559040 is about 886.8707339925.

The spelling of 697559040 in words is "six hundred ninety-seven million, five hundred fifty-nine thousand, forty".