40099972 has 12 divisors (see below), whose sum is σ = 76554576. Its totient is φ = 18227240.

The previous prime is 40099963. The next prime is 40099973. The reversal of 40099972 is 27999004.

It is not an unprimeable number, because it can be changed into a prime (40099973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455638 + ... + 455725.

It is an arithmetic number, because the mean of its divisors is an integer number (6379548).

Almost surely, 2^40099972 is an apocalyptic number.

It is an amenable number.

40099972 is a deficient number, since it is larger than the sum of its proper divisors (36454604).

40099972 is a wasteful number, since it uses less digits than its factorization.

40099972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911378 (or 911376 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 40099972 is about 6332.4538687621. The cubic root of 40099972 is about 342.2798684929.

The spelling of 40099972 in words is "forty million, ninety-nine thousand, nine hundred seventy-two".