87621996 has 288 divisors, whose sum is σ = 294174720. Its totient is φ = 19958400.

The previous prime is 87621991. The next prime is 87622001. The reversal of 87621996 is 69912678.

It is an interprime number because it is at equal distance from previous prime (87621991) and next prime (87622001).

It is a super-2 number, since 2×87621996² = 15355228366048032, which contains 22 as substring.

Its product of digits (326592) is a multiple of the sum of its prime divisors (96).

It is not an unprimeable number, because it can be changed into a prime (87621991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2826501 + ... + 2826531.

It is an arithmetic number, because the mean of its divisors is an integer number (1021440).

Almost surely, 2^87621996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87621996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147087360).

87621996 is an abundant number, since it is smaller than the sum of its proper divisors (206552724).

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

87621996 is a wasteful number, since it uses less digits than its factorization.

87621996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 96 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 87621996 is about 9360.6621560657. The cubic root of 87621996 is about 444.1582302691.

The spelling of 87621996 in words is "eighty-seven million, six hundred twenty-one thousand, nine hundred ninety-six".