42668648 has 32 divisors (see below), whose sum is σ = 90097920. Its totient is φ = 18768000.

The previous prime is 42668629. The next prime is 42668693. The reversal of 42668648 is 84686624.

It is a super-2 number, since 2×42668648² = 3641227044295808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 42668599 and 42668608.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5093 + ... + 10548.

It is an arithmetic number, because the mean of its divisors is an integer number (2815560).

Almost surely, 2^42668648 is an apocalyptic number.

It is an amenable number.

42668648 is an abundant number, since it is smaller than the sum of its proper divisors (47429272).

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

42668648 is a wasteful number, since it uses less digits than its factorization.

42668648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15689 (or 15685 counting only the distinct ones).

The product of its digits is 442368, while the sum is 44.

The square root of 42668648 is about 6532.1243099010. The cubic root of 42668648 is about 349.4375947298.

The spelling of 42668648 in words is "forty-two million, six hundred sixty-eight thousand, six hundred forty-eight".