690879456 has 120 divisors (see below), whose sum is σ = 2151515520. Its totient is φ = 216732672.

The previous prime is 690879437. The next prime is 690879517. The reversal of 690879456 is 654978096.

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 (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36225 + ... + 51903.

It is an arithmetic number, because the mean of its divisors is an integer number (17929296).

Almost surely, 2^690879456 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 690879456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1075757760).

690879456 is an abundant number, since it is smaller than the sum of its proper divisors (1460636064).

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

690879456 is a wasteful number, since it uses less digits than its factorization.

690879456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15718 (or 15701 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The square root of 690879456 is about 26284.5859012464. The cubic root of 690879456 is about 884.0308609716.

The spelling of 690879456 in words is "six hundred ninety million, eight hundred seventy-nine thousand, four hundred fifty-six".