249472404 has 18 divisors (see below), whose sum is σ = 630610890. Its totient is φ = 83157456.

The previous prime is 249472397. The next prime is 249472409. The reversal of 249472404 is 404274942.

249472404 is a `hidden beast` number, since 249 + 4 + 7 + 2 + 404 = 666.

It can be written as a sum of positive squares in only one way, i.e., 185504400 + 63968004 = 13620^2 + 7998^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6929789 = 249472404 / (2 + 4 + 9 + 4 + 7 + 2 + 4 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249472409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3464859 + ... + 3464930.

Almost surely, 2^249472404 is an apocalyptic number.

It is an amenable number.

249472404 is an abundant number, since it is smaller than the sum of its proper divisors (381138486).

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

249472404 is a wasteful number, since it uses less digits than its factorization.

249472404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6929799 (or 6929794 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 249472404 is about 15794.6954386591. The cubic root of 249472404 is about 629.5170599697.

The spelling of 249472404 in words is "two hundred forty-nine million, four hundred seventy-two thousand, four hundred four".