87764880 has 240 divisors, whose sum is σ = 335871360. Its totient is φ = 18837504.

The previous prime is 87764869. The next prime is 87764899. The reversal of 87764880 is 8846778.

87764880 = T₄₀₀ + T₄₀₁ + ... + T₈₃₈.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×87764880² = 15405348322828800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 199701 + ... + 200139.

It is an arithmetic number, because the mean of its divisors is an integer number (1399464).

Almost surely, 2^87764880 is an apocalyptic number.

87764880 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 87764880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167935680).

87764880 is an abundant number, since it is smaller than the sum of its proper divisors (248106480).

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

87764880 is a wasteful number, since it uses less digits than its factorization.

87764880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 48.

The square root of 87764880 is about 9368.2911995732. The cubic root of 87764880 is about 444.3995267569.

The spelling of 87764880 in words is "eighty-seven million, seven hundred sixty-four thousand, eight hundred eighty".