697580640 has 192 divisors, whose sum is σ = 2464862400. Its totient is φ = 184246272.

The previous prime is 697580623. The next prime is 697580657. The reversal of 697580640 is 46085796.

697580640 is a `hidden beast` number, since 6 + 9 + 7 + 580 + 64 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (697580623) and next prime (697580657).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 487446 + ... + 488874.

It is an arithmetic number, because the mean of its divisors is an integer number (12837825).

Almost surely, 2^697580640 is an apocalyptic number.

697580640 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 697580640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1232431200).

697580640 is an abundant number, since it is smaller than the sum of its proper divisors (1767281760).

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

697580640 is a wasteful number, since it uses less digits than its factorization.

697580640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1552 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 697580640 is about 26411.7519297755. The cubic root of 697580640 is about 886.8798879179.

The spelling of 697580640 in words is "six hundred ninety-seven million, five hundred eighty thousand, six hundred forty".