87079780 has 24 divisors (see below), whose sum is σ = 193625208. Its totient is φ = 32782848.

The previous prime is 87079753. The next prime is 87079787. The reversal of 87079780 is 8797078.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48664576 + 38415204 = 6976^2 + 6198^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87079780.

It is not an unprimeable number, because it can be changed into a prime (87079787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127719 + ... + 128398.

It is an arithmetic number, because the mean of its divisors is an integer number (8067717).

Almost surely, 2^87079780 is an apocalyptic number.

It is an amenable number.

87079780 is an abundant number, since it is smaller than the sum of its proper divisors (106545428).

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

87079780 is a wasteful number, since it uses less digits than its factorization.

87079780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256143 (or 256141 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 46.

The square root of 87079780 is about 9331.6547300037. The cubic root of 87079780 is about 443.2401648425.

The spelling of 87079780 in words is "eighty-seven million, seventy-nine thousand, seven hundred eighty".