749307840 has 112 divisors (see below), whose sum is σ = 2429816832. Its totient is φ = 195552256.

The previous prime is 749307773. The next prime is 749307857. The reversal of 749307840 is 48703947.

It is a super-2 number, since 2×749307840² = 1122924478170931200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 749307792 and 749307801.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 36817 + ... + 53423.

Almost surely, 2^749307840 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 749307840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1214908416).

749307840 is an abundant number, since it is smaller than the sum of its proper divisors (1680508992).

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

749307840 is a wasteful number, since it uses less digits than its factorization.

749307840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16674 (or 16664 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 749307840 is about 27373.4879034441. The cubic root of 749307840 is about 908.2807130157.

The spelling of 749307840 in words is "seven hundred forty-nine million, three hundred seven thousand, eight hundred forty".