40039401 has 16 divisors (see below), whose sum is σ = 56059200. Its totient is φ = 25384128.

The previous prime is 40039393. The next prime is 40039421. The reversal of 40039401 is 10493004.

It is not a de Polignac number, because 40039401 - 2³ = 40039393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40039421) 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, 2395 + ... + 9263.

It is an arithmetic number, because the mean of its divisors is an integer number (3503700).

Almost surely, 2^40039401 is an apocalyptic number.

It is an amenable number.

40039401 is a deficient number, since it is larger than the sum of its proper divisors (16019799).

40039401 is a wasteful number, since it uses less digits than its factorization.

40039401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6968.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 40039401 is about 6327.6694761974. The cubic root of 40039401 is about 342.1074437561.

The spelling of 40039401 in words is "forty million, thirty-nine thousand, four hundred one".