86662728 has 48 divisors (see below), whose sum is σ = 235513980. Its totient is φ = 28788864.

The previous prime is 86662727. The next prime is 86662729. The reversal of 86662728 is 82726668.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (86662727) and next prime (86662729).

It can be written as a sum of positive squares in 2 ways, for example, as 58339044 + 28323684 = 7638^2 + 5322^2 .

It is not an unprimeable number, because it can be changed into a prime (86662727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20926 + ... + 24722.

Almost surely, 2^86662728 is an apocalyptic number.

It is an amenable number.

86662728 is an abundant number, since it is smaller than the sum of its proper divisors (148851252).

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

86662728 is a wasteful number, since it uses less digits than its factorization.

86662728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4126 (or 4119 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 86662728 is about 9309.2818197754. The cubic root of 86662728 is about 442.5314274337.

The spelling of 86662728 in words is "eighty-six million, six hundred sixty-two thousand, seven hundred twenty-eight".