406344644 has 24 divisors (see below), whose sum is σ = 724643136. Its totient is φ = 199332000.

The previous prime is 406344641. The next prime is 406344647. The reversal of 406344644 is 446443604.

It is an interprime number because it is at equal distance from previous prime (406344641) and next prime (406344647).

It is not an unprimeable number, because it can be changed into a prime (406344641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56534 + ... + 63314.

It is an arithmetic number, because the mean of its divisors is an integer number (30193464).

Almost surely, 2^406344644 is an apocalyptic number.

It is an amenable number.

406344644 is a deficient number, since it is larger than the sum of its proper divisors (318298492).

406344644 is a wasteful number, since it uses less digits than its factorization.

406344644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7067 (or 7065 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 35.

The square root of 406344644 is about 20157.9920627031. The cubic root of 406344644 is about 740.6815269905.

The spelling of 406344644 in words is "four hundred six million, three hundred forty-four thousand, six hundred forty-four".