87749994 has 16 divisors (see below), whose sum is σ = 175603968. Its totient is φ = 29232672.

The previous prime is 87749993. The next prime is 87750001. The reversal of 87749994 is 49994778.

It is a super-2 number, since 2×87749994² = 15400122894000072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87749993) 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, 10599 + ... + 16965.

It is an arithmetic number, because the mean of its divisors is an integer number (10975248).

Almost surely, 2^87749994 is an apocalyptic number.

87749994 is an abundant number, since it is smaller than the sum of its proper divisors (87853974).

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

87749994 is a wasteful number, since it uses less digits than its factorization.

87749994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8669.

The product of its digits is 4572288, while the sum is 57.

The square root of 87749994 is about 9367.4966773413. The cubic root of 87749994 is about 444.3744001329.

The spelling of 87749994 in words is "eighty-seven million, seven hundred forty-nine thousand, nine hundred ninety-four".