40290039 has 6 divisors (see below), whose sum is σ = 58196736. Its totient is φ = 26860020.

The previous prime is 40290023. The next prime is 40290053. The reversal of 40290039 is 93009204.

It is not a de Polignac number, because 40290039 - 2⁴ = 40290023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40289994 and 40290021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40290539) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2238327 + ... + 2238344.

It is an arithmetic number, because the mean of its divisors is an integer number (9699456).

Almost surely, 2^40290039 is an apocalyptic number.

40290039 is a deficient number, since it is larger than the sum of its proper divisors (17906697).

40290039 is a wasteful number, since it uses less digits than its factorization.

40290039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476677 (or 4476674 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 40290039 is about 6347.4435011270. The cubic root of 40290039 is about 342.8197989833.

The spelling of 40290039 in words is "forty million, two hundred ninety thousand, thirty-nine".