42640960 has 28 divisors (see below), whose sum is σ = 101539548. Its totient is φ = 17056256.

The previous prime is 42640957. The next prime is 42641009. The reversal of 42640960 is 6904624.

It can be written as a sum of positive squares in 2 ways, for example, as 29333056 + 13307904 = 5416^2 + 3648^2 .

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, 66307 + ... + 66946.

Almost surely, 2^42640960 is an apocalyptic number.

42640960 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42640960 is an abundant number, since it is smaller than the sum of its proper divisors (58898588).

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

42640960 is a wasteful number, since it uses less digits than its factorization.

42640960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133270 (or 133260 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 42640960 is about 6530.0045941791. The cubic root of 42640960 is about 349.3619941651.

The spelling of 42640960 in words is "forty-two million, six hundred forty thousand, nine hundred sixty".