215400604 has 24 divisors (see below), whose sum is σ = 385257600. Its totient is φ = 105352944.

The previous prime is 215400599. The next prime is 215400629. The reversal of 215400604 is 406004512.

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 7 ways as a sum of consecutive naturals, for example, 31047 + ... + 37345.

It is an arithmetic number, because the mean of its divisors is an integer number (16052400).

Almost surely, 2^215400604 is an apocalyptic number.

It is an amenable number.

215400604 is a deficient number, since it is larger than the sum of its proper divisors (169856996).

215400604 is a wasteful number, since it uses less digits than its factorization.

215400604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6489 (or 6487 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 215400604 is about 14676.5324242479. The cubic root of 215400604 is about 599.4444895427. Note that the first 4 decimals are identical.

The spelling of 215400604 in words is "two hundred fifteen million, four hundred thousand, six hundred four".