438007540 has 12 divisors (see below), whose sum is σ = 919815876. Its totient is φ = 175203008.

The previous prime is 438007489. The next prime is 438007553. The reversal of 438007540 is 45700834.

It can be written as a sum of positive squares in 2 ways, for example, as 96275344 + 341732196 = 9812^2 + 18486^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10950169 + ... + 10950208.

It is an arithmetic number, because the mean of its divisors is an integer number (76651323).

Almost surely, 2^438007540 is an apocalyptic number.

It is an amenable number.

438007540 is an abundant number, since it is smaller than the sum of its proper divisors (481808336).

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

438007540 is a wasteful number, since it uses less digits than its factorization.

438007540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21900386 (or 21900384 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 438007540 is about 20928.6296732490. The cubic root of 438007540 is about 759.4406895930.

The spelling of 438007540 in words is "four hundred thirty-eight million, seven thousand, five hundred forty".