86969728 has 16 divisors (see below), whose sum is σ = 173260260. Its totient is φ = 43484800.

The previous prime is 86969719. The next prime is 86969747. The reversal of 86969728 is 82796968.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339598 + ... + 339853.

Almost surely, 2^86969728 is an apocalyptic number.

It is an amenable number.

86969728 is a deficient number, since it is larger than the sum of its proper divisors (86290532).

86969728 is an equidigital number, since it uses as much as digits as its factorization.

86969728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679465 (or 679453 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 55.

The square root of 86969728 is about 9325.7561623710. The cubic root of 86969728 is about 443.0533628458.

The spelling of 86969728 in words is "eighty-six million, nine hundred sixty-nine thousand, seven hundred twenty-eight".