749138988 has 96 divisors (see below), whose sum is σ = 1930521600. Its totient is φ = 224699904.

The previous prime is 749138981. The next prime is 749139007. The reversal of 749138988 is 889831947.

749138988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×749138988² = 1122418446683328288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (749138981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1096495 + ... + 1097177.

It is an arithmetic number, because the mean of its divisors is an integer number (20109600).

Almost surely, 2^749138988 is an apocalyptic number.

749138988 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 749138988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (965260800).

749138988 is an abundant number, since it is smaller than the sum of its proper divisors (1181382612).

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

749138988 is a wasteful number, since it uses less digits than its factorization.

749138988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871 (or 869 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 57.

The square root of 749138988 is about 27370.4035045156. The cubic root of 749138988 is about 908.2124826978.

The spelling of 749138988 in words is "seven hundred forty-nine million, one hundred thirty-eight thousand, nine hundred eighty-eight".