88691728 has 20 divisors (see below), whose sum is σ = 172516860. Its totient is φ = 44171264.

The previous prime is 88691711. The next prime is 88691731. The reversal of 88691728 is 82719688.

It can be written as a sum of positive squares in 2 ways, for example, as 46076944 + 42614784 = 6788^2 + 6528^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6673 + ... + 14896.

It is an arithmetic number, because the mean of its divisors is an integer number (8625843).

Almost surely, 2^88691728 is an apocalyptic number.

It is an amenable number.

88691728 is a deficient number, since it is larger than the sum of its proper divisors (83825132).

88691728 is a wasteful number, since it uses less digits than its factorization.

88691728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21834 (or 21828 counting only the distinct ones).

The product of its digits is 387072, while the sum is 49.

The square root of 88691728 is about 9417.6285762393. The cubic root of 88691728 is about 445.9584241376.

The spelling of 88691728 in words is "eighty-eight million, six hundred ninety-one thousand, seven hundred twenty-eight".