747421938 has 64 divisors (see below), whose sum is σ = 1749369600. Its totient is φ = 236079360.

The previous prime is 747421921. The next prime is 747421951. The reversal of 747421938 is 839124747.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 747421893 and 747421902.

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 31 ways as a sum of consecutive naturals, for example, 132618 + ... + 138138.

It is an arithmetic number, because the mean of its divisors is an integer number (27333900).

Almost surely, 2^747421938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 747421938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (874684800).

747421938 is an abundant number, since it is smaller than the sum of its proper divisors (1001947662).

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

747421938 is a wasteful number, since it uses less digits than its factorization.

747421938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5664 (or 5658 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 747421938 is about 27339.0185997962. The cubic root of 747421938 is about 907.5180680782.

The spelling of 747421938 in words is "seven hundred forty-seven million, four hundred twenty-one thousand, nine hundred thirty-eight".