87307780 has 48 divisors (see below), whose sum is σ = 216308736. Its totient is φ = 28967040.

The previous prime is 87307763. The next prime is 87307789. The reversal of 87307780 is 8770378.

It is not an unprimeable number, because it can be changed into a prime (87307789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5719 + ... + 14398.

It is an arithmetic number, because the mean of its divisors is an integer number (4506432).

Almost surely, 2^87307780 is an apocalyptic number.

It is an amenable number.

87307780 is an abundant number, since it is smaller than the sum of its proper divisors (129000956).

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

87307780 is a wasteful number, since it uses less digits than its factorization.

87307780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20164 (or 20162 counting only the distinct ones).

The product of its (nonzero) digits is 65856, while the sum is 40.

The square root of 87307780 is about 9343.8632267387. The cubic root of 87307780 is about 443.6266712750.

The spelling of 87307780 in words is "eighty-seven million, three hundred seven thousand, seven hundred eighty".