87415866 has 24 divisors (see below), whose sum is σ = 189589140. Its totient is φ = 29109696.

The previous prime is 87415841. The next prime is 87415871. The reversal of 87415866 is 66851478.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68310225 + 19105641 = 8265^2 + 4371^2 .

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, 24100 + ... + 27488.

Almost surely, 2^87415866 is an apocalyptic number.

87415866 is an abundant number, since it is smaller than the sum of its proper divisors (102173274).

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

87415866 is a wasteful number, since it uses less digits than its factorization.

87415866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830 (or 4827 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The square root of 87415866 is about 9349.6452339113. The cubic root of 87415866 is about 443.8096639739.

The spelling of 87415866 in words is "eighty-seven million, four hundred fifteen thousand, eight hundred sixty-six".