690379872 has 144 divisors (see below), whose sum is σ = 2243082240. Its totient is φ = 182048256.

The previous prime is 690379841. The next prime is 690379897. The reversal of 690379872 is 278973096.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110529 + ... + 116607.

It is an arithmetic number, because the mean of its divisors is an integer number (15576960).

Almost surely, 2^690379872 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 690379872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121541120).

690379872 is an abundant number, since it is smaller than the sum of its proper divisors (1552702368).

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

690379872 is a wasteful number, since it uses less digits than its factorization.

690379872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6125 (or 6104 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 51.

The square root of 690379872 is about 26275.0808181440. The cubic root of 690379872 is about 883.8177248177.

The spelling of 690379872 in words is "six hundred ninety million, three hundred seventy-nine thousand, eight hundred seventy-two".