40049915 has 16 divisors (see below), whose sum is σ = 48818208. Its totient is φ = 31539456.

The previous prime is 40049897. The next prime is 40049921. The reversal of 40049915 is 51994004.

It is a cyclic number.

It is not a de Polignac number, because 40049915 - 2¹⁴ = 40033531 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127799 + ... + 128111.

It is an arithmetic number, because the mean of its divisors is an integer number (3051138).

Almost surely, 2^40049915 is an apocalyptic number.

40049915 is a deficient number, since it is larger than the sum of its proper divisors (8768293).

40049915 is a wasteful number, since it uses less digits than its factorization.

40049915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 40049915 is about 6328.5002172711. The cubic root of 40049915 is about 342.1373859528.

The spelling of 40049915 in words is "forty million, forty-nine thousand, nine hundred fifteen".