87920968 has 8 divisors (see below), whose sum is σ = 164851830. Its totient is φ = 43960480.

The previous prime is 87920909. The next prime is 87920969. The reversal of 87920968 is 86902978.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 70930084 + 16990884 = 8422^2 + 4122^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×87920968² = 15460193228114048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87920969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5495053 + ... + 5495068.

Almost surely, 2^87920968 is an apocalyptic number.

It is an amenable number.

87920968 is a deficient number, since it is larger than the sum of its proper divisors (76930862).

87920968 is a wasteful number, since it uses less digits than its factorization.

87920968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10990127 (or 10990123 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 87920968 is about 9376.6181536842. The cubic root of 87920968 is about 444.6628224785.

It can be divided in two parts, 87920 and 968, that added together give a palindrome (88888).

The spelling of 87920968 in words is "eighty-seven million, nine hundred twenty thousand, nine hundred sixty-eight".