690412672 has 16 divisors (see below), whose sum is σ = 1375431750. Its totient is φ = 345206272.

The previous prime is 690412663. The next prime is 690412673. The reversal of 690412672 is 276214096.

It can be written as a sum of positive squares in only one way, i.e., 376981056 + 313431616 = 19416^2 + 17704^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (690412673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2696797 + ... + 2697052.

Almost surely, 2^690412672 is an apocalyptic number.

It is an amenable number.

690412672 is a deficient number, since it is larger than the sum of its proper divisors (685019078).

690412672 is an equidigital number, since it uses as much as digits as its factorization.

690412672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5393863 (or 5393851 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 690412672 is about 26275.7049762704. The cubic root of 690412672 is about 883.8317213450.

The spelling of 690412672 in words is "six hundred ninety million, four hundred twelve thousand, six hundred seventy-two".