42665980 has 24 divisors (see below), whose sum is σ = 102398688. Its totient is φ = 14628288.

The previous prime is 42665957. The next prime is 42666053. The reversal of 42665980 is 8956624.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 152239 + ... + 152518.

It is an arithmetic number, because the mean of its divisors is an integer number (4266612).

Almost surely, 2^42665980 is an apocalyptic number.

It is an amenable number.

42665980 is an abundant number, since it is smaller than the sum of its proper divisors (59732708).

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

42665980 is a wasteful number, since it uses less digits than its factorization.

42665980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304773 (or 304771 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 42665980 is about 6531.9200852429. The cubic root of 42665980 is about 349.4303113264.

The spelling of 42665980 in words is "forty-two million, six hundred sixty-five thousand, nine hundred eighty".