87785274 has 64 divisors (see below), whose sum is σ = 187545600. Its totient is φ = 27361152.

The previous prime is 87785251. The next prime is 87785279. The reversal of 87785274 is 47258778.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (87785279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1111167 + ... + 1111245.

It is an arithmetic number, because the mean of its divisors is an integer number (2930400).

Almost surely, 2^87785274 is an apocalyptic number.

87785274 is an abundant number, since it is smaller than the sum of its proper divisors (99760326).

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

87785274 is a wasteful number, since it uses less digits than its factorization.

87785274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259.

The product of its digits is 878080, while the sum is 48.

The square root of 87785274 is about 9369.3795952560. The cubic root of 87785274 is about 444.4339459233.

The spelling of 87785274 in words is "eighty-seven million, seven hundred eighty-five thousand, two hundred seventy-four".