438400842 has 32 divisors (see below), whose sum is σ = 974566080. Its totient is φ = 130341120.

The previous prime is 438400793. The next prime is 438400871. The reversal of 438400842 is 248004834.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59167 + ... + 66162.

It is an arithmetic number, because the mean of its divisors is an integer number (30455190).

Almost surely, 2^438400842 is an apocalyptic number.

438400842 is an abundant number, since it is smaller than the sum of its proper divisors (536165238).

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

438400842 is a wasteful number, since it uses less digits than its factorization.

438400842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125398.

The product of its (nonzero) digits is 24576, while the sum is 33.

The square root of 438400842 is about 20938.0238322531. The cubic root of 438400842 is about 759.6679308756.

The spelling of 438400842 in words is "four hundred thirty-eight million, four hundred thousand, eight hundred forty-two".