42644780 has 12 divisors (see below), whose sum is σ = 89554080. Its totient is φ = 17057904.

The previous prime is 42644779. The next prime is 42644803. The reversal of 42644780 is 8744624.

It is a super-2 number, since 2×42644780² = 3637154522496800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42644780.

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, 1066100 + ... + 1066139.

It is an arithmetic number, because the mean of its divisors is an integer number (7462840).

Almost surely, 2^42644780 is an apocalyptic number.

It is an amenable number.

42644780 is an abundant number, since it is smaller than the sum of its proper divisors (46909300).

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

42644780 is a wasteful number, since it uses less digits than its factorization.

42644780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132248 (or 2132246 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 42644780 is about 6530.2970835943. The cubic root of 42644780 is about 349.3724264112.

The spelling of 42644780 in words is "forty-two million, six hundred forty-four thousand, seven hundred eighty".