87791274 has 12 divisors (see below), whose sum is σ = 190214466. Its totient is φ = 29263752.

The previous prime is 87791273. The next prime is 87791339. The reversal of 87791274 is 47219778.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 86211225 + 1580049 = 9285^2 + 1257^2 .

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 Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87791273) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2438629 + ... + 2438664.

Almost surely, 2^87791274 is an apocalyptic number.

87791274 is an abundant number, since it is smaller than the sum of its proper divisors (102423192).

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

87791274 is a wasteful number, since it uses less digits than its factorization.

87791274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877301 (or 4877298 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 87791274 is about 9369.6997817433. The cubic root of 87791274 is about 444.4440711710. Note that the first 3 decimals are identical.

The spelling of 87791274 in words is "eighty-seven million, seven hundred ninety-one thousand, two hundred seventy-four".