40907979 has 24 divisors (see below), whose sum is σ = 67702752. Its totient is φ = 23316480.

The previous prime is 40907963. The next prime is 40907981. The reversal of 40907979 is 97970904.

It is not a de Polignac number, because 40907979 - 2⁴ = 40907963 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40907939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39877 + ... + 40889.

It is an arithmetic number, because the mean of its divisors is an integer number (2820948).

Almost surely, 2^40907979 is an apocalyptic number.

40907979 is a deficient number, since it is larger than the sum of its proper divisors (26794773).

40907979 is a wasteful number, since it uses less digits than its factorization.

40907979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667 (or 1664 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 40907979 is about 6395.9345681456. The cubic root of 40907979 is about 344.5635564890.

The spelling of 40907979 in words is "forty million, nine hundred seven thousand, nine hundred seventy-nine".