86728144 has 10 divisors (see below), whose sum is σ = 168035810. Its totient is φ = 43364064.

The previous prime is 86728129. The next prime is 86728151. The reversal of 86728144 is 44182768.

It can be written as a sum of positive squares in only one way, i.e., 86490000 + 238144 = 9300^2 + 488^2 .

It is a junction number, because it is equal to n+sod(n) for n = 86728097 and 86728106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2710239 + ... + 2710270.

It is an arithmetic number, because the mean of its divisors is an integer number (16803581).

Almost surely, 2^86728144 is an apocalyptic number.

It is an amenable number.

86728144 is a deficient number, since it is larger than the sum of its proper divisors (81307666).

86728144 is a wasteful number, since it uses less digits than its factorization.

86728144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5420517 (or 5420511 counting only the distinct ones).

The product of its digits is 86016, while the sum is 40.

The square root of 86728144 is about 9312.7946396342. The cubic root of 86728144 is about 442.6427453969.

The spelling of 86728144 in words is "eighty-six million, seven hundred twenty-eight thousand, one hundred forty-four".