42657780 has 48 divisors (see below), whose sum is σ = 130302144. Its totient is φ = 10341120.

The previous prime is 42657773. The next prime is 42657803. The reversal of 42657780 is 8775624.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31657 + ... + 32976.

It is an arithmetic number, because the mean of its divisors is an integer number (2714628).

Almost surely, 2^42657780 is an apocalyptic number.

It is an amenable number.

42657780 is an abundant number, since it is smaller than the sum of its proper divisors (87644364).

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

42657780 is a wasteful number, since it uses less digits than its factorization.

42657780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64656 (or 64654 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 42657780 is about 6531.2923682836. The cubic root of 42657780 is about 349.4079241525.

The spelling of 42657780 in words is "forty-two million, six hundred fifty-seven thousand, seven hundred eighty".