42628881 has 16 divisors (see below), whose sum is σ = 57746304. Its totient is φ = 27969024.

The previous prime is 42628871. The next prime is 42628909. The reversal of 42628881 is 18882624.

It is not a de Polignac number, because 42628881 - 2⁵ = 42628849 is a prime.

It is a super-2 number, since 2×42628881² = 3634442990624322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42628871) 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, 76255 + ... + 76811.

It is an arithmetic number, because the mean of its divisors is an integer number (3609144).

Almost surely, 2^42628881 is an apocalyptic number.

It is an amenable number.

42628881 is a deficient number, since it is larger than the sum of its proper divisors (15117423).

42628881 is a wasteful number, since it uses less digits than its factorization.

42628881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920.

The product of its digits is 49152, while the sum is 39.

The square root of 42628881 is about 6529.0796441765. The cubic root of 42628881 is about 349.3290028656.

The spelling of 42628881 in words is "forty-two million, six hundred twenty-eight thousand, eight hundred eighty-one".