42990880 has 24 divisors (see below), whose sum is σ = 101566332. Its totient is φ = 17196288.

The previous prime is 42990877. The next prime is 42990889. The reversal of 42990880 is 8809924.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36820624 + 6170256 = 6068^2 + 2484^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (42990889) 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, 134187 + ... + 134506.

Almost surely, 2^42990880 is an apocalyptic number.

42990880 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42990880 is an abundant number, since it is smaller than the sum of its proper divisors (58575452).

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

42990880 is a wasteful number, since it uses less digits than its factorization.

42990880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268708 (or 268700 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 42990880 is about 6556.7430939453. The cubic root of 42990880 is about 350.3150360779.

The spelling of 42990880 in words is "forty-two million, nine hundred ninety thousand, eight hundred eighty".