406431938 has 16 divisors (see below), whose sum is σ = 665435520. Its totient is φ = 184640400.

The previous prime is 406431929. The next prime is 406431947. The reversal of 406431938 is 839134604.

It is an interprime number because it is at equal distance from previous prime (406431929) and next prime (406431947).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48503 + ... + 56261.

It is an arithmetic number, because the mean of its divisors is an integer number (41589720).

Almost surely, 2^406431938 is an apocalyptic number.

406431938 is a deficient number, since it is larger than the sum of its proper divisors (259003582).

406431938 is a wasteful number, since it uses less digits than its factorization.

406431938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10153.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 406431938 is about 20160.1571918475. The cubic root of 406431938 is about 740.7345627773.

The spelling of 406431938 in words is "four hundred six million, four hundred thirty-one thousand, nine hundred thirty-eight".