86238278440 has 128 divisors (see below), whose sum is σ = 209972217600. Its totient is φ = 31776675840.

The previous prime is 86238278429. The next prime is 86238278479. The reversal of 86238278440 is 4487283268.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3928134 + ... + 3950026.

It is an arithmetic number, because the mean of its divisors is an integer number (1640407950).

Almost surely, 2^86238278440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86238278440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104986108800).

86238278440 is an abundant number, since it is smaller than the sum of its proper divisors (123733939160).

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

86238278440 is a wasteful number, since it uses less digits than its factorization.

86238278440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22067 (or 22063 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 52.

The spelling of 86238278440 in words is "eighty-six billion, two hundred thirty-eight million, two hundred seventy-eight thousand, four hundred forty".