690749088 has 24 divisors (see below), whose sum is σ = 1813216608. Its totient is φ = 230249664.

The previous prime is 690749077. The next prime is 690749107. The reversal of 690749088 is 880947096.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 690749088.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3597556 + ... + 3597747.

It is an arithmetic number, because the mean of its divisors is an integer number (75550692).

Almost surely, 2^690749088 is an apocalyptic number.

It is an amenable number.

690749088 is an abundant number, since it is smaller than the sum of its proper divisors (1122467520).

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

690749088 is a wasteful number, since it uses less digits than its factorization.

690749088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7195316 (or 7195308 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 690749088 is about 26282.1058517007. The cubic root of 690749088 is about 883.9752523391.

The spelling of 690749088 in words is "six hundred ninety million, seven hundred forty-nine thousand, eighty-eight".