406139634 has 24 divisors (see below), whose sum is σ = 880708140. Its totient is φ = 135266208.

The previous prime is 406139627. The next prime is 406139641. The reversal of 406139634 is 436931604.

406139634 is a `hidden beast` number, since 4 + 0 + 6 + 13 + 9 + 634 = 666.

It is an interprime number because it is at equal distance from previous prime (406139627) and next prime (406139641).

It can be written as a sum of positive squares in 2 ways, for example, as 403407225 + 2732409 = 20085^2 + 1653^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14152 + ... + 31820.

Almost surely, 2^406139634 is an apocalyptic number.

406139634 is an abundant number, since it is smaller than the sum of its proper divisors (474568506).

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

406139634 is a wasteful number, since it uses less digits than its factorization.

406139634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18954 (or 18951 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 406139634 is about 20152.9063412700. The cubic root of 406139634 is about 740.5569425472.

The spelling of 406139634 in words is "four hundred six million, one hundred thirty-nine thousand, six hundred thirty-four".