749643820 has 24 divisors (see below), whose sum is σ = 1580115600. Its totient is φ = 298740672.

The previous prime is 749643809. The next prime is 749643821. The reversal of 749643820 is 28346947.

It is not an unprimeable number, because it can be changed into a prime (749643821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64290 + ... + 75049.

It is an arithmetic number, because the mean of its divisors is an integer number (65838150).

Almost surely, 2^749643820 is an apocalyptic number.

It is an amenable number.

749643820 is an abundant number, since it is smaller than the sum of its proper divisors (830471780).

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

749643820 is a wasteful number, since it uses less digits than its factorization.

749643820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139617 (or 139615 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 43.

The square root of 749643820 is about 27379.6241756530. The cubic root of 749643820 is about 908.4164465280.

The spelling of 749643820 in words is "seven hundred forty-nine million, six hundred forty-three thousand, eight hundred twenty".