406664394 has 32 divisors (see below), whose sum is σ = 828896640. Its totient is φ = 132985152.

The previous prime is 406664381. The next prime is 406664413. The reversal of 406664394 is 493466604.

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, 64344 + ... + 70380.

It is an arithmetic number, because the mean of its divisors is an integer number (25903020).

Almost surely, 2^406664394 is an apocalyptic number.

406664394 is an abundant number, since it is smaller than the sum of its proper divisors (422232246).

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

406664394 is a wasteful number, since it uses less digits than its factorization.

406664394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6254.

The product of its (nonzero) digits is 373248, while the sum is 42.

The square root of 406664394 is about 20165.9216005617. The cubic root of 406664394 is about 740.8757552383.

The spelling of 406664394 in words is "four hundred six million, six hundred sixty-four thousand, three hundred ninety-four".