40399332 has 12 divisors (see below), whose sum is σ = 94265136. Its totient is φ = 13466440.

The previous prime is 40399321. The next prime is 40399343. The reversal of 40399332 is 23399304.

It is an interprime number because it is at equal distance from previous prime (40399321) and next prime (40399343).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 40399293 and 40399302.

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, 1683294 + ... + 1683317.

It is an arithmetic number, because the mean of its divisors is an integer number (7855428).

Almost surely, 2^40399332 is an apocalyptic number.

It is an amenable number.

40399332 is an abundant number, since it is smaller than the sum of its proper divisors (53865804).

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

40399332 is a wasteful number, since it uses less digits than its factorization.

40399332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366618 (or 3366616 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 33.

The square root of 40399332 is about 6356.0468846603. The cubic root of 40399332 is about 343.1295031277.

The spelling of 40399332 in words is "forty million, three hundred ninety-nine thousand, three hundred thirty-two".