696608640 has 512 divisors, whose sum is σ = 3043353600. Its totient is φ = 146644992.

The previous prime is 696608639. The next prime is 696608669. The reversal of 696608640 is 46806696.

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 63 ways as a sum of consecutive naturals, for example, 1572259 + ... + 1572701.

It is an arithmetic number, because the mean of its divisors is an integer number (5944050).

Almost surely, 2^696608640 is an apocalyptic number.

696608640 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 696608640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1521676800).

696608640 is an abundant number, since it is smaller than the sum of its proper divisors (2346744960).

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

696608640 is a wasteful number, since it uses less digits than its factorization.

696608640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 696608640 is about 26393.3446156413. The cubic root of 696608640 is about 886.4677740582.

The spelling of 696608640 in words is "six hundred ninety-six million, six hundred eight thousand, six hundred forty".