87780042 has 48 divisors (see below), whose sum is σ = 224864640. Its totient is φ = 24214176.

The previous prime is 87780041. The next prime is 87780047. The reversal of 87780042 is 24008778.

It is a junction number, because it is equal to n+sod(n) for n = 87779979 and 87780006.

It is not an unprimeable number, because it can be changed into a prime (87780041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8358 + ... + 15665.

It is an arithmetic number, because the mean of its divisors is an integer number (4684680).

Almost surely, 2^87780042 is an apocalyptic number.

87780042 is an abundant number, since it is smaller than the sum of its proper divisors (137084598).

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

87780042 is a wasteful number, since it uses less digits than its factorization.

87780042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24067 (or 24064 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 87780042 is about 9369.1003837081. The cubic root of 87780042 is about 444.4251163308.

The spelling of 87780042 in words is "eighty-seven million, seven hundred eighty thousand, forty-two".