438447940 has 24 divisors (see below), whose sum is σ = 1052275392. Its totient is φ = 150324960.

The previous prime is 438447929. The next prime is 438447941. The reversal of 438447940 is 49744834.

It is not an unprimeable number, because it can be changed into a prime (438447941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1565746 + ... + 1566025.

It is an arithmetic number, because the mean of its divisors is an integer number (43844808).

Almost surely, 2^438447940 is an apocalyptic number.

It is an amenable number.

438447940 is an abundant number, since it is smaller than the sum of its proper divisors (613827452).

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

438447940 is a wasteful number, since it uses less digits than its factorization.

438447940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131787 (or 3131785 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 438447940 is about 20939.1485022672. The cubic root of 438447940 is about 759.6951339552.

The spelling of 438447940 in words is "four hundred thirty-eight million, four hundred forty-seven thousand, nine hundred forty".