213776964 has 36 divisors (see below), whose sum is σ = 541260720. Its totient is φ = 71142960.

The previous prime is 213776939. The next prime is 213777017. The reversal of 213776964 is 469677312.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19219 + ... + 28229.

It is an arithmetic number, because the mean of its divisors is an integer number (15035020).

Almost surely, 2^213776964 is an apocalyptic number.

It is an amenable number.

213776964 is an abundant number, since it is smaller than the sum of its proper divisors (327483756).

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

213776964 is a wasteful number, since it uses less digits than its factorization.

213776964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9680 (or 9675 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 213776964 is about 14621.1136374765. The cubic root of 213776964 is about 597.9345312235.

The spelling of 213776964 in words is "two hundred thirteen million, seven hundred seventy-six thousand, nine hundred sixty-four".