87890880 has 448 divisors, whose sum is σ = 368686080. Its totient is φ = 17203200.

The previous prime is 87890879. The next prime is 87890927. The reversal of 87890880 is 8809878.

87890880 = T₂₄₁ + T₂₄₂ + ... + T₈₁₄.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2143660 + ... + 2143700.

It is an arithmetic number, because the mean of its divisors is an integer number (822960).

Almost surely, 2^87890880 is an apocalyptic number.

87890880 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87890880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184343040).

87890880 is an abundant number, since it is smaller than the sum of its proper divisors (280795200).

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

87890880 is a wasteful number, since it uses less digits than its factorization.

87890880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The square root of 87890880 is about 9375.0135999901. The cubic root of 87890880 is about 444.6120930497.

The spelling of 87890880 in words is "eighty-seven million, eight hundred ninety thousand, eight hundred eighty".