87774220 has 12 divisors (see below), whose sum is σ = 184325904. Its totient is φ = 35109680.

The previous prime is 87774217. The next prime is 87774227. The reversal of 87774220 is 2247778.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 87774220.

It is not an unprimeable number, because it can be changed into a prime (87774227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2194336 + ... + 2194375.

It is an arithmetic number, because the mean of its divisors is an integer number (15360492).

Almost surely, 2^87774220 is an apocalyptic number.

It is an amenable number.

87774220 is an abundant number, since it is smaller than the sum of its proper divisors (96551684).

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

87774220 is a wasteful number, since it uses less digits than its factorization.

87774220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388720 (or 4388718 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 87774220 is about 9368.7896763670. The cubic root of 87774220 is about 444.4152906340.

The spelling of 87774220 in words is "eighty-seven million, seven hundred seventy-four thousand, two hundred twenty".