438875640 has 96 divisors (see below), whose sum is σ = 1630118880. Its totient is φ = 100313856.

The previous prime is 438875629. The next prime is 438875641. The reversal of 438875640 is 46578834.

438875640 is a `hidden beast` number, since 4 + 3 + 8 + 87 + 564 + 0 = 666.

It is a super-2 number, since 2×438875640² = 385223654770819200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438875641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84559 + ... + 89598.

It is an arithmetic number, because the mean of its divisors is an integer number (16980405).

Almost surely, 2^438875640 is an apocalyptic number.

438875640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

438875640 is an abundant number, since it is smaller than the sum of its proper divisors (1191243240).

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

438875640 is a wasteful number, since it uses less digits than its factorization.

438875640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174181 (or 174174 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The square root of 438875640 is about 20949.3589400726. The cubic root of 438875640 is about 759.9420777648.

The spelling of 438875640 in words is "four hundred thirty-eight million, eight hundred seventy-five thousand, six hundred forty".