86281440 has 96 divisors (see below), whose sum is σ = 310625280. Its totient is φ = 19720704.

The previous prime is 86281421. The next prime is 86281471. The reversal of 86281440 is 4418268.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9480 + ... + 16199.

It is an arithmetic number, because the mean of its divisors is an integer number (3235680).

Almost surely, 2^86281440 is an apocalyptic number.

86281440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86281440 is an abundant number, since it is smaller than the sum of its proper divisors (224343840).

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

86281440 is a wasteful number, since it uses less digits than its factorization.

86281440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25704 (or 25696 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 86281440 is about 9288.7803289775. The cubic root of 86281440 is about 441.8814748772.

The spelling of 86281440 in words is "eighty-six million, two hundred eighty-one thousand, four hundred forty".