87808281 has 16 divisors (see below), whose sum is σ = 135235008. Its totient is φ = 50086400.

The previous prime is 87808243. The next prime is 87808307. The reversal of 87808281 is 18280878.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 87808281 - 2¹⁰ = 87807257 is a prime.

It is a super-2 number, since 2×87808281² = 15420588424349922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87808211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77700 + ... + 78821.

It is an arithmetic number, because the mean of its divisors is an integer number (8452188).

Almost surely, 2^87808281 is an apocalyptic number.

It is an amenable number.

87808281 is a deficient number, since it is larger than the sum of its proper divisors (47426727).

87808281 is a wasteful number, since it uses less digits than its factorization.

87808281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156552.

The product of its (nonzero) digits is 57344, while the sum is 42.

The square root of 87808281 is about 9370.6072908857. The cubic root of 87808281 is about 444.4727686787.

The spelling of 87808281 in words is "eighty-seven million, eight hundred eight thousand, two hundred eighty-one".