87723252 has 18 divisors (see below), whose sum is σ = 221744978. Its totient is φ = 29241072.

The previous prime is 87723239. The next prime is 87723257. The reversal of 87723252 is 25232778.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 87721956 + 1296 = 9366^2 + 36^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2436757 = 87723252 / (8 + 7 + 7 + 2 + 3 + 2 + 5 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87723257) 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, 1218343 + ... + 1218414.

Almost surely, 2^87723252 is an apocalyptic number.

It is an amenable number.

87723252 is an abundant number, since it is smaller than the sum of its proper divisors (134021726).

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

87723252 is a wasteful number, since it uses less digits than its factorization.

87723252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436767 (or 2436762 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 87723252 is about 9366.0691861634. The cubic root of 87723252 is about 444.3292541941.

The spelling of 87723252 in words is "eighty-seven million, seven hundred twenty-three thousand, two hundred fifty-two".