81270288 has 60 divisors (see below), whose sum is σ = 248125488. Its totient is φ = 24626880.

The previous prime is 81270281. The next prime is 81270307. The reversal of 81270288 is 88207218.

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

It is not an unprimeable number, because it can be changed into a prime (81270281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24070 + ... + 27237.

Almost surely, 2^81270288 is an apocalyptic number.

81270288 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

81270288 is an abundant number, since it is smaller than the sum of its proper divisors (166855200).

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

81270288 is a wasteful number, since it uses less digits than its factorization.

81270288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51332 (or 51323 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 81270288 is about 9015.0034941757. The cubic root of 81270288 is about 433.1555994323.

The spelling of 81270288 in words is "eighty-one million, two hundred seventy thousand, two hundred eighty-eight".