213868044 has 72 divisors (see below), whose sum is σ = 586294800. Its totient is φ = 65342592.

The previous prime is 213868033. The next prime is 213868073. The reversal of 213868044 is 440868312.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68199 + ... + 71265.

Almost surely, 2^213868044 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213868044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293147400).

213868044 is an abundant number, since it is smaller than the sum of its proper divisors (372426756).

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

213868044 is a wasteful number, since it uses less digits than its factorization.

213868044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239 (or 3234 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 213868044 is about 14624.2279796234. The cubic root of 213868044 is about 598.0194361382.

The spelling of 213868044 in words is "two hundred thirteen million, eight hundred sixty-eight thousand, forty-four".