87292172 has 12 divisors (see below), whose sum is σ = 166648776. Its totient is φ = 39678240.

The previous prime is 87292171. The next prime is 87292189. The reversal of 87292172 is 27129278.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (87292171) 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, 991913 + ... + 992000.

It is an arithmetic number, because the mean of its divisors is an integer number (13887398).

Almost surely, 2^87292172 is an apocalyptic number.

It is an amenable number.

87292172 is a deficient number, since it is larger than the sum of its proper divisors (79356604).

87292172 is a wasteful number, since it uses less digits than its factorization.

87292172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983928 (or 1983926 counting only the distinct ones).

The product of its digits is 28224, while the sum is 38.

The square root of 87292172 is about 9343.0279888267. The cubic root of 87292172 is about 443.6002340063.

It can be divided in two parts, 8729 and 2172, that added together give a palindrome (10901).

The spelling of 87292172 in words is "eighty-seven million, two hundred ninety-two thousand, one hundred seventy-two".