213964860 has 48 divisors (see below), whose sum is σ = 625153536. Its totient is φ = 54576192.

The previous prime is 213964853. The next prime is 213964879. The reversal of 213964860 is 68469312.

It is a super-2 number, since 2×213964860² = 91561922629639200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76144 + ... + 78903.

It is an arithmetic number, because the mean of its divisors is an integer number (13024032).

Almost surely, 2^213964860 is an apocalyptic number.

213964860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213964860 is an abundant number, since it is smaller than the sum of its proper divisors (411188676).

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

213964860 is a wasteful number, since it uses less digits than its factorization.

213964860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155082 (or 155080 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 213964860 is about 14627.5377285447. The cubic root of 213964860 is about 598.1096617344.

The spelling of 213964860 in words is "two hundred thirteen million, nine hundred sixty-four thousand, eight hundred sixty".