86128444 has 24 divisors (see below), whose sum is σ = 159004160. Its totient is φ = 40708656.

The previous prime is 86128429. The next prime is 86128459. The reversal of 86128444 is 44482168.

It is an interprime number because it is at equal distance from previous prime (86128429) and next prime (86128459).

It is a super-2 number, since 2×86128444² = 14836217731722272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45199 + ... + 47065.

Almost surely, 2^86128444 is an apocalyptic number.

It is an amenable number.

86128444 is a deficient number, since it is larger than the sum of its proper divisors (72875716).

86128444 is a wasteful number, since it uses less digits than its factorization.

86128444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2495 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 86128444 is about 9280.5411480150. The cubic root of 86128444 is about 441.6201359469.

It can be divided in two parts, 861284 and 44, that added together give a triangular number (861328 = T₁₃₁₂).

The spelling of 86128444 in words is "eighty-six million, one hundred twenty-eight thousand, four hundred forty-four".