87319380 has 24 divisors (see below), whose sum is σ = 244494432. Its totient is φ = 23285152.

The previous prime is 87319357. The next prime is 87319387. The reversal of 87319380 is 8391378.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87319387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 727602 + ... + 727721.

It is an arithmetic number, because the mean of its divisors is an integer number (10187268).

Almost surely, 2^87319380 is an apocalyptic number.

It is an amenable number.

87319380 is an abundant number, since it is smaller than the sum of its proper divisors (157175052).

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

87319380 is a wasteful number, since it uses less digits than its factorization.

87319380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1455335 (or 1455333 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 87319380 is about 9344.4839343861. The cubic root of 87319380 is about 443.6463176398.

The spelling of 87319380 in words is "eighty-seven million, three hundred nineteen thousand, three hundred eighty".