690252912 has 120 divisors (see below), whose sum is σ = 1975061088. Its totient is φ = 224985600.

The previous prime is 690252911. The next prime is 690252923. The reversal of 690252912 is 219252096.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690252911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1850358 + ... + 1850730.

Almost surely, 2^690252912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 690252912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (987530544).

690252912 is an abundant number, since it is smaller than the sum of its proper divisors (1284808176).

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

690252912 is a wasteful number, since it uses less digits than its factorization.

690252912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639 (or 630 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 690252912 is about 26272.6647297148. The cubic root of 690252912 is about 883.7635438361.

The spelling of 690252912 in words is "six hundred ninety million, two hundred fifty-two thousand, nine hundred twelve".