749185920 has 384 divisors, whose sum is σ = 3133391040. Its totient is φ = 161021952.

The previous prime is 749185909. The next prime is 749185949. The reversal of 749185920 is 29581947.

749185920 is a `hidden beast` number, since 7 + 49 + 18 + 592 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×749185920² = 1122559085452492800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 684894 + ... + 685986.

Almost surely, 2^749185920 is an apocalyptic number.

749185920 is a gapful number since it is divisible by the number (70) 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 749185920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1566695520).

749185920 is an abundant number, since it is smaller than the sum of its proper divisors (2384205120).

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

749185920 is a wasteful number, since it uses less digits than its factorization.

749185920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142 (or 1127 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 749185920 is about 27371.2608405240. The cubic root of 749185920 is about 908.2314481763.

The spelling of 749185920 in words is "seven hundred forty-nine million, one hundred eighty-five thousand, nine hundred twenty".