42920780 has 24 divisors (see below), whose sum is σ = 103010208. Its totient is φ = 14715648.

The previous prime is 42920743. The next prime is 42920819. The reversal of 42920780 is 8702924.

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, 153149 + ... + 153428.

It is an arithmetic number, because the mean of its divisors is an integer number (4292092).

Almost surely, 2^42920780 is an apocalyptic number.

It is an amenable number.

42920780 is an abundant number, since it is smaller than the sum of its proper divisors (60089428).

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

42920780 is a wasteful number, since it uses less digits than its factorization.

42920780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306593 (or 306591 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 42920780 is about 6551.3952712380. The cubic root of 42920780 is about 350.1245271176.

The spelling of 42920780 in words is "forty-two million, nine hundred twenty thousand, seven hundred eighty".