87280740 has 72 divisors (see below), whose sum is σ = 274572480. Its totient is φ = 23273568.

The previous prime is 87280727. The next prime is 87280747. The reversal of 87280740 is 4708278.

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

It is a junction number, because it is equal to n+sod(n) for n = 87280695 and 87280704.

It is not an unprimeable number, because it can be changed into a prime (87280747) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 4120 + ... + 13839.

Almost surely, 2^87280740 is an apocalyptic number.

It is an amenable number.

87280740 is an abundant number, since it is smaller than the sum of its proper divisors (187291740).

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

87280740 is a wasteful number, since it uses less digits than its factorization.

87280740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17983 (or 17969 counting only the distinct ones).

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

The square root of 87280740 is about 9342.4161757010. The cubic root of 87280740 is about 443.5808681641.

The spelling of 87280740 in words is "eighty-seven million, two hundred eighty thousand, seven hundred forty".