86440478040 has 192 divisors, whose sum is σ = 321195663360. Its totient is φ = 19749761280.

The previous prime is 86440478039. The next prime is 86440478041. The reversal of 86440478040 is 4087404468.

It is an interprime number because it is at equal distance from previous prime (86440478039) and next prime (86440478041).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86440478041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7975425 + ... + 7986255.

It is an arithmetic number, because the mean of its divisors is an integer number (1672894080).

Almost surely, 2^86440478040 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 86440478040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160597831680).

86440478040 is an abundant number, since it is smaller than the sum of its proper divisors (234755185320).

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

86440478040 is a wasteful number, since it uses less digits than its factorization.

86440478040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14022 (or 14015 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 45.

The spelling of 86440478040 in words is "eighty-six billion, four hundred forty million, four hundred seventy-eight thousand, forty".