690981732 has 192 divisors, whose sum is σ = 2182656000. Its totient is φ = 188606880.

The previous prime is 690981713. The next prime is 690981737. The reversal of 690981732 is 237189096.

690981732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (690981737) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 851607 + ... + 852417.

It is an arithmetic number, because the mean of its divisors is an integer number (11368000).

Almost surely, 2^690981732 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 690981732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1091328000).

690981732 is an abundant number, since it is smaller than the sum of its proper divisors (1491674268).

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

690981732 is a wasteful number, since it uses less digits than its factorization.

690981732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 846 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 690981732 is about 26286.5313801574. The cubic root of 690981732 is about 884.0744820299.

The spelling of 690981732 in words is "six hundred ninety million, nine hundred eighty-one thousand, seven hundred thirty-two".