690216404 has 12 divisors (see below), whose sum is σ = 1212337728. Its totient is φ = 343834200.

The previous prime is 690216391. The next prime is 690216409. The reversal of 690216404 is 404612096.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690216409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317282 + ... + 319449.

It is an arithmetic number, because the mean of its divisors is an integer number (101028144).

Almost surely, 2^690216404 is an apocalyptic number.

It is an amenable number.

690216404 is a deficient number, since it is larger than the sum of its proper divisors (522121324).

690216404 is a wasteful number, since it uses less digits than its factorization.

690216404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637006 (or 637004 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 690216404 is about 26271.9699299463. The cubic root of 690216404 is about 883.7479625867.

The spelling of 690216404 in words is "six hundred ninety million, two hundred sixteen thousand, four hundred four".