697610880 has 160 divisors (see below), whose sum is σ = 2491479540. Its totient is φ = 186015744.

The previous prime is 697610869. The next prime is 697610899. The reversal of 697610880 is 88016796.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 631416384 + 66194496 = 25128^2 + 8136^2 .

It is a tau number, because it is divible by the number of its divisors (160).

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

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 45112 + ... + 58568.

Almost surely, 2^697610880 is an apocalyptic number.

697610880 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 697610880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1245739770).

697610880 is an abundant number, since it is smaller than the sum of its proper divisors (1793868660).

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

697610880 is a wasteful number, since it uses less digits than its factorization.

697610880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13488 (or 13467 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 697610880 is about 26412.3243960088. The cubic root of 697610880 is about 886.8927030959.

The spelling of 697610880 in words is "six hundred ninety-seven million, six hundred ten thousand, eight hundred eighty".