690724412928 has 480 divisors, whose sum is σ = 2261757738240. Its totient is φ = 208707010560.

The previous prime is 690724412909. The next prime is 690724412933. The reversal of 690724412928 is 829214427096.

It is a happy number.

690724412928 is a `hidden beast` number, since 6 + 90 + 72 + 441 + 29 + 28 = 666.

It is a super-2 number, since 2×690724412928² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 778719301 + ... + 778720187.

It is an arithmetic number, because the mean of its divisors is an integer number (4711995288).

Almost surely, 2^690724412928 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 690724412928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130878869120).

690724412928 is an abundant number, since it is smaller than the sum of its proper divisors (1571033325312).

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

690724412928 is an equidigital number, since it uses as much as digits as its factorization.

690724412928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1500 (or 1472 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 690724412928 in words is "six hundred ninety billion, seven hundred twenty-four million, four hundred twelve thousand, nine hundred twenty-eight".