87408720 has 400 divisors, whose sum is σ = 362976768. Its totient is φ = 19077120.

The previous prime is 87408709. The next prime is 87408779. The reversal of 87408720 is 2780478.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1859737 + ... + 1859783.

Almost surely, 2^87408720 is an apocalyptic number.

87408720 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 87408720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (181488384).

87408720 is an abundant number, since it is smaller than the sum of its proper divisors (275568048).

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

87408720 is a wasteful number, since it uses less digits than its factorization.

87408720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 87408720 is about 9349.2630725635. The cubic root of 87408720 is about 443.7975702491.

The spelling of 87408720 in words is "eighty-seven million, four hundred eight thousand, seven hundred twenty".