87646770 has 24 divisors (see below), whose sum is σ = 227881836. Its totient is φ = 23372448.

The previous prime is 87646763. The next prime is 87646799. The reversal of 87646770 is 7764678.

It can be written as a sum of positive squares in 2 ways, for example, as 72131049 + 15515721 = 8493^2 + 3939^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 486837 + ... + 487016.

Almost surely, 2^87646770 is an apocalyptic number.

87646770 is an abundant number, since it is smaller than the sum of its proper divisors (140235066).

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

87646770 is a wasteful number, since it uses less digits than its factorization.

87646770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973866 (or 973863 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 45.

The square root of 87646770 is about 9361.9853663633. The cubic root of 87646770 is about 444.2000863464.

The spelling of 87646770 in words is "eighty-seven million, six hundred forty-six thousand, seven hundred seventy".