87691226 has 16 divisors (see below), whose sum is σ = 156864384. Its totient is φ = 35947824.

The previous prime is 87691223. The next prime is 87691267. The reversal of 87691226 is 62219678.

It is a super-2 number, since 2×87691226² = 15379502234766152, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87691223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135845 + ... + 136488.

It is an arithmetic number, because the mean of its divisors is an integer number (9804024).

Almost surely, 2^87691226 is an apocalyptic number.

87691226 is a deficient number, since it is larger than the sum of its proper divisors (69173158).

87691226 is a wasteful number, since it uses less digits than its factorization.

87691226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272365.

The product of its digits is 72576, while the sum is 41.

The square root of 87691226 is about 9364.3593480814. The cubic root of 87691226 is about 444.2751757127.

The spelling of 87691226 in words is "eighty-seven million, six hundred ninety-one thousand, two hundred twenty-six".