749139798 has 48 divisors (see below), whose sum is σ = 1650519360. Its totient is φ = 226509360.

The previous prime is 749139793. The next prime is 749139821. The reversal of 749139798 is 897931947.

It is a super-2 number, since 2×749139798² = 1122420873894961608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749139793) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 448561 + ... + 450227.

It is an arithmetic number, because the mean of its divisors is an integer number (34385820).

Almost surely, 2^749139798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 749139798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (825259680).

749139798 is an abundant number, since it is smaller than the sum of its proper divisors (901379562).

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

749139798 is a wasteful number, since it uses less digits than its factorization.

749139798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313 (or 2302 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 57.

The square root of 749139798 is about 27370.4183015167. The cubic root of 749139798 is about 908.2128100299.

The spelling of 749139798 in words is "seven hundred forty-nine million, one hundred thirty-nine thousand, seven hundred ninety-eight".