749138688 has 216 divisors, whose sum is σ = 2309106800. Its totient is φ = 232906752.

The previous prime is 749138671. The next prime is 749138713. The reversal of 749138688 is 886831947.

It is a super-2 number, since 2×749138688² = 1122417547716722688, which contains 22 as substring.

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 23 ways as a sum of consecutive naturals, for example, 4771506 + ... + 4771662.

Almost surely, 2^749138688 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 749138688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1154553400).

749138688 is an abundant number, since it is smaller than the sum of its proper divisors (1559968112).

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

749138688 is a wasteful number, since it uses less digits than its factorization.

749138688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 290 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 749138688 is about 27370.3980241428. The cubic root of 749138688 is about 908.2123614636.

The spelling of 749138688 in words is "seven hundred forty-nine million, one hundred thirty-eight thousand, six hundred eighty-eight".