40828239 has 16 divisors (see below), whose sum is σ = 61045600. Its totient is φ = 26967168.

The previous prime is 40828223. The next prime is 40828247. The reversal of 40828239 is 93282804.

It is not a de Polignac number, because 40828239 - 2⁴ = 40828223 is a prime.

It is a super-2 number, since 2×40828239² = 3333890199682242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40828219) 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, 3994 + ... + 9879.

It is an arithmetic number, because the mean of its divisors is an integer number (3815350).

Almost surely, 2^40828239 is an apocalyptic number.

40828239 is a deficient number, since it is larger than the sum of its proper divisors (20217361).

40828239 is a wasteful number, since it uses less digits than its factorization.

40828239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13991 (or 13985 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 40828239 is about 6389.6978801818. The cubic root of 40828239 is about 344.3395303515.

It can be divided in two parts, 408282 and 39, that added together give a square (408321 = 639²).

The spelling of 40828239 in words is "forty million, eight hundred twenty-eight thousand, two hundred thirty-nine".