87191276 has 12 divisors (see below), whose sum is σ = 152703600. Its totient is φ = 43561680.

The previous prime is 87191267. The next prime is 87191287. The reversal of 87191276 is 67219178.

It is a super-2 number, since 2×87191276² = 15204637221016352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2195 + ... + 13386.

It is an arithmetic number, because the mean of its divisors is an integer number (12725300).

Almost surely, 2^87191276 is an apocalyptic number.

It is an amenable number.

87191276 is a deficient number, since it is larger than the sum of its proper divisors (65512324).

87191276 is a wasteful number, since it uses less digits than its factorization.

87191276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16984 (or 16982 counting only the distinct ones).

The product of its digits is 42336, while the sum is 41.

The square root of 87191276 is about 9337.6268933814. The cubic root of 87191276 is about 443.4292574514.

The spelling of 87191276 in words is "eighty-seven million, one hundred ninety-one thousand, two hundred seventy-six".