40097439 has 12 divisors (see below), whose sum is σ = 59151456. Its totient is φ = 26162592.

The previous prime is 40097417. The next prime is 40097443. The reversal of 40097439 is 93479004.

It is not a de Polignac number, because 40097439 - 2⁷ = 40097311 is a prime.

It is a super-2 number, since 2×40097439² = 3215609228717442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40097479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46974 + ... + 47819.

It is an arithmetic number, because the mean of its divisors is an integer number (4929288).

Almost surely, 2^40097439 is an apocalyptic number.

40097439 is a deficient number, since it is larger than the sum of its proper divisors (19054017).

40097439 is a wasteful number, since it uses less digits than its factorization.

40097439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94846 (or 94843 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 40097439 is about 6332.2538641466. The cubic root of 40097439 is about 342.2726613959.

The spelling of 40097439 in words is "forty million, ninety-seven thousand, four hundred thirty-nine".