87280320 has 56 divisors (see below), whose sum is σ = 277118064. Its totient is φ = 23274496.

The previous prime is 87280247. The next prime is 87280321. The reversal of 87280320 is 2308278.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (87280321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44499 + ... + 46418.

Almost surely, 2^87280320 is an apocalyptic number.

87280320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87280320 is an abundant number, since it is smaller than the sum of its proper divisors (189837744).

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

87280320 is a wasteful number, since it uses less digits than its factorization.

87280320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90937 (or 90927 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 87280320 is about 9342.3936975488. The cubic root of 87280320 is about 443.5801566506.

Adding to 87280320 its reverse (2308278), we get a palindrome (89588598).

The spelling of 87280320 in words is "eighty-seven million, two hundred eighty thousand, three hundred twenty".