40469979 has 16 divisors (see below), whose sum is σ = 62328960. Its totient is φ = 23084160.

The previous prime is 40469969. The next prime is 40469987. The reversal of 40469979 is 97996404.

It is not a de Polignac number, because 40469979 - 2⁷ = 40469851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40469939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35509 + ... + 36630.

It is an arithmetic number, because the mean of its divisors is an integer number (3895560).

Almost surely, 2^40469979 is an apocalyptic number.

40469979 is a deficient number, since it is larger than the sum of its proper divisors (21858981).

40469979 is a wasteful number, since it uses less digits than its factorization.

40469979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72170.

The product of its (nonzero) digits is 489888, while the sum is 48.

The square root of 40469979 is about 6361.6019209001. The cubic root of 40469979 is about 343.3293987882.

The spelling of 40469979 in words is "forty million, four hundred sixty-nine thousand, nine hundred seventy-nine".