42400660 has 24 divisors (see below), whose sum is σ = 89381376. Its totient is φ = 16895520.

The previous prime is 42400619. The next prime is 42400679. The reversal of 42400660 is 6600424.

It is a congruent number.

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, 1509 + ... + 9331.

It is an arithmetic number, because the mean of its divisors is an integer number (3724224).

Almost surely, 2^42400660 is an apocalyptic number.

It is an amenable number.

42400660 is an abundant number, since it is smaller than the sum of its proper divisors (46980716).

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

42400660 is a wasteful number, since it uses less digits than its factorization.

42400660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8103 (or 8101 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 42400660 is about 6511.5789175898. The cubic root of 42400660 is about 348.7044895500.

The spelling of 42400660 in words is "forty-two million, four hundred thousand, six hundred sixty".