40072239 has 10 divisors (see below), whose sum is σ = 59861120. Its totient is φ = 26714772.

The previous prime is 40072237. The next prime is 40072261. The reversal of 40072239 is 93227004.

It is not a de Polignac number, because 40072239 - 2¹ = 40072237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40072237) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 247279 + ... + 247440.

It is an arithmetic number, because the mean of its divisors is an integer number (5986112).

Almost surely, 2^40072239 is an apocalyptic number.

40072239 is a deficient number, since it is larger than the sum of its proper divisors (19788881).

40072239 is an equidigital number, since it uses as much as digits as its factorization.

40072239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494731 (or 494722 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 40072239 is about 6330.2637385815. The cubic root of 40072239 is about 342.2009437766.

The spelling of 40072239 in words is "forty million, seventy-two thousand, two hundred thirty-nine".