87723780 has 24 divisors (see below), whose sum is σ = 245626752. Its totient is φ = 23392992.

The previous prime is 87723751. The next prime is 87723787. The reversal of 87723780 is 8732778.

It is not an unprimeable number, because it can be changed into a prime (87723787) 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, 730972 + ... + 731091.

It is an arithmetic number, because the mean of its divisors is an integer number (10234448).

Almost surely, 2^87723780 is an apocalyptic number.

It is an amenable number.

87723780 is an abundant number, since it is smaller than the sum of its proper divisors (157902972).

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

87723780 is a wasteful number, since it uses less digits than its factorization.

87723780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462075 (or 1462073 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 87723780 is about 9366.0973729724. The cubic root of 87723780 is about 444.3301456543.

The spelling of 87723780 in words is "eighty-seven million, seven hundred twenty-three thousand, seven hundred eighty".