42992439 has 16 divisors (see below), whose sum is σ = 69366528. Its totient is φ = 23121792.

The previous prime is 42992431. The next prime is 42992441. The reversal of 42992439 is 93429924.

It is not a de Polignac number, because 42992439 - 2³ = 42992431 is a prime.

It is a super-2 number, since 2×42992439² = 3696699622337442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42992439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42992431) 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, 59857 + ... + 60570.

It is an arithmetic number, because the mean of its divisors is an integer number (4335408).

Almost surely, 2^42992439 is an apocalyptic number.

42992439 is a deficient number, since it is larger than the sum of its proper divisors (26374089).

42992439 is a wasteful number, since it uses less digits than its factorization.

42992439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120454.

The product of its digits is 139968, while the sum is 42.

The square root of 42992439 is about 6556.8619781112. The cubic root of 42992439 is about 350.3192705771.

The spelling of 42992439 in words is "forty-two million, nine hundred ninety-two thousand, four hundred thirty-nine".