40207739 has 16 divisors (see below), whose sum is σ = 47416320. Its totient is φ = 33612960.

The previous prime is 40207721. The next prime is 40207753. The reversal of 40207739 is 93770204.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40207739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40207339) 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, 68204 + ... + 68790.

It is an arithmetic number, because the mean of its divisors is an integer number (2963520).

Almost surely, 2^40207739 is an apocalyptic number.

40207739 is a deficient number, since it is larger than the sum of its proper divisors (7208581).

40207739 is a wasteful number, since it uses less digits than its factorization.

40207739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 40207739 is about 6340.9572621174. The cubic root of 40207739 is about 342.5862151758.

The spelling of 40207739 in words is "forty million, two hundred seven thousand, seven hundred thirty-nine".