42997872 has 20 divisors (see below), whose sum is σ = 111077960. Its totient is φ = 14332608.

The previous prime is 42997859. The next prime is 42997897. The reversal of 42997872 is 27879924.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 895789 = 42997872 / (4 + 2 + 9 + 9 + 7 + 8 + 7 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447847 + ... + 447942.

It is an arithmetic number, because the mean of its divisors is an integer number (5553898).

Almost surely, 2^42997872 is an apocalyptic number.

It is an amenable number.

42997872 is an abundant number, since it is smaller than the sum of its proper divisors (68080088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42997872 is a wasteful number, since it uses less digits than its factorization.

42997872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895800 (or 895794 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 42997872 is about 6557.2762638156. The cubic root of 42997872 is about 350.3340266944.

The spelling of 42997872 in words is "forty-two million, nine hundred ninety-seven thousand, eight hundred seventy-two".