40328644 has 12 divisors (see below), whose sum is σ = 72851968. Its totient is φ = 19513800.

The previous prime is 40328633. The next prime is 40328653. The reversal of 40328644 is 44682304.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162492 + ... + 162739.

Almost surely, 2^40328644 is an apocalyptic number.

It is an amenable number.

40328644 is a deficient number, since it is larger than the sum of its proper divisors (32523324).

40328644 is a wasteful number, since it uses less digits than its factorization.

40328644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325266 (or 325264 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 40328644 is about 6350.4837611004. The cubic root of 40328644 is about 342.9292580779.

The spelling of 40328644 in words is "forty million, three hundred twenty-eight thousand, six hundred forty-four".