438902649 has 12 divisors (see below), whose sum is σ = 634588500. Its totient is φ = 292316544.

The previous prime is 438902627. The next prime is 438902687. The reversal of 438902649 is 946209834.

438902649 is a `hidden beast` number, since 4 + 389 + 0 + 264 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 300675600 + 138227049 = 17340^2 + 11757^2 .

It is not a de Polignac number, because 438902649 - 2²³ = 430514041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (438902609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13804 + ... + 32685.

It is an arithmetic number, because the mean of its divisors is an integer number (52882375).

Almost surely, 2^438902649 is an apocalyptic number.

It is an amenable number.

438902649 is a deficient number, since it is larger than the sum of its proper divisors (195685851).

438902649 is a wasteful number, since it uses less digits than its factorization.

438902649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47544 (or 47541 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 438902649 is about 20950.0035560856. The cubic root of 438902649 is about 759.9576667325.

The spelling of 438902649 in words is "four hundred thirty-eight million, nine hundred two thousand, six hundred forty-nine".