87661746 has 24 divisors (see below), whose sum is σ = 190794240. Its totient is φ = 29088216.

The previous prime is 87661733. The next prime is 87661747. The reversal of 87661746 is 64716678.

It is not an unprimeable number, because it can be changed into a prime (87661747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6906 + ... + 14933.

It is an arithmetic number, because the mean of its divisors is an integer number (7949760).

Almost surely, 2^87661746 is an apocalyptic number.

87661746 is an abundant number, since it is smaller than the sum of its proper divisors (103132494).

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

87661746 is a wasteful number, since it uses less digits than its factorization.

87661746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22070 (or 22067 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 87661746 is about 9362.7851625465. The cubic root of 87661746 is about 444.2253847179.

The spelling of 87661746 in words is "eighty-seven million, six hundred sixty-one thousand, seven hundred forty-six".