387442431 has 12 divisors (see below), whose sum is σ = 565073808. Its totient is φ = 255786624.

The previous prime is 387442421. The next prime is 387442469. The reversal of 387442431 is 134244783.

It is not a de Polignac number, because 387442431 - 2⁷ = 387442303 is a prime.

It is a super-2 number, since 2×387442431² = 300223274678379522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387442411) 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, 208050 + ... + 209903.

It is an arithmetic number, because the mean of its divisors is an integer number (47089484).

Almost surely, 2^387442431 is an apocalyptic number.

387442431 is a deficient number, since it is larger than the sum of its proper divisors (177631377).

387442431 is a wasteful number, since it uses less digits than its factorization.

387442431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418062 (or 418059 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 387442431 is about 19683.5573766532. The cubic root of 387442431 is about 729.0137623215.

The spelling of 387442431 in words is "three hundred eighty-seven million, four hundred forty-two thousand, four hundred thirty-one".