213578940 has 24 divisors (see below), whose sum is σ = 598021200. Its totient is φ = 56954368.

The previous prime is 213578899. The next prime is 213578971. The reversal of 213578940 is 49875312.

It is a super-2 number, since 2×213578940² = 91231927223047200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1779765 + ... + 1779884.

It is an arithmetic number, because the mean of its divisors is an integer number (24917550).

Almost surely, 2^213578940 is an apocalyptic number.

213578940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213578940 is an abundant number, since it is smaller than the sum of its proper divisors (384442260).

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

213578940 is a wasteful number, since it uses less digits than its factorization.

213578940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3559661 (or 3559659 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 213578940 is about 14614.3402177450. The cubic root of 213578940 is about 597.7498496995.

The spelling of 213578940 in words is "two hundred thirteen million, five hundred seventy-eight thousand, nine hundred forty".