249580644 has 12 divisors (see below), whose sum is σ = 582354864. Its totient is φ = 83193544.

The previous prime is 249580631. The next prime is 249580663. The reversal of 249580644 is 446085942.

249580644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 249580596 and 249580605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10399182 + ... + 10399205.

It is an arithmetic number, because the mean of its divisors is an integer number (48529572).

Almost surely, 2^249580644 is an apocalyptic number.

It is an amenable number.

249580644 is an abundant number, since it is smaller than the sum of its proper divisors (332774220).

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

249580644 is a wasteful number, since it uses less digits than its factorization.

249580644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20798394 (or 20798392 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The square root of 249580644 is about 15798.1215339040. The cubic root of 249580644 is about 629.6080908456.

The spelling of 249580644 in words is "two hundred forty-nine million, five hundred eighty thousand, six hundred forty-four".