42798831 has 4 divisors (see below), whose sum is σ = 57065112. Its totient is φ = 28532552.

The previous prime is 42798827. The next prime is 42798857. The reversal of 42798831 is 13889724.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42798831 - 2² = 42798827 is a prime.

It is a super-2 number, since 2×42798831² = 3663479869933122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42793831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7133136 + ... + 7133141.

It is an arithmetic number, because the mean of its divisors is an integer number (14266278).

Almost surely, 2^42798831 is an apocalyptic number.

42798831 is a deficient number, since it is larger than the sum of its proper divisors (14266281).

42798831 is a wasteful number, since it uses less digits than its factorization.

42798831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14266280.

The product of its digits is 96768, while the sum is 42.

The square root of 42798831 is about 6542.0815494764. The cubic root of 42798831 is about 349.7926145572.

The spelling of 42798831 in words is "forty-two million, seven hundred ninety-eight thousand, eight hundred thirty-one".