688400970 has 32 divisors (see below), whose sum is σ = 1739119680. Its totient is φ = 173911680.

The previous prime is 688400969. The next prime is 688400983. The reversal of 688400970 is 79004886.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 603291 + ... + 604430.

It is an arithmetic number, because the mean of its divisors is an integer number (54347490).

Almost surely, 2^688400970 is an apocalyptic number.

688400970 is an abundant number, since it is smaller than the sum of its proper divisors (1050718710).

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

688400970 is a wasteful number, since it uses less digits than its factorization.

688400970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1207750.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 688400970 is about 26237.3964028445. The cubic root of 688400970 is about 882.9724595280.

The spelling of 688400970 in words is "six hundred eighty-eight million, four hundred thousand, nine hundred seventy".