689772690 has 48 divisors (see below), whose sum is σ = 1797120000. Its totient is φ = 183558816.

The previous prime is 689772641. The next prime is 689772697. The reversal of 689772690 is 96277986.

It is a super-2 number, since 2×689772690² = 951572727739672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (689772697) 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, 37231 + ... + 52589.

It is an arithmetic number, because the mean of its divisors is an integer number (37440000).

Almost surely, 2^689772690 is an apocalyptic number.

689772690 is an abundant number, since it is smaller than the sum of its proper divisors (1107347310).

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

689772690 is a wasteful number, since it uses less digits than its factorization.

689772690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15871 (or 15868 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 689772690 is about 26263.5239448175. The cubic root of 689772690 is about 883.5585459535.

The spelling of 689772690 in words is "six hundred eighty-nine million, seven hundred seventy-two thousand, six hundred ninety".