1938358272 has 68 divisors (see below), whose sum is σ = 5169440240. Its totient is φ = 646053888.

The previous prime is 1938358237. The next prime is 1938358273. The reversal of 1938358272 is 2728538391.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1938358273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191679 + ... + 201537.

It is an arithmetic number, because the mean of its divisors is an integer number (76021180).

Almost surely, 2^1938358272 is an apocalyptic number.

1938358272 is a gapful number since it is divisible by the number (12) 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 1938358272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2584720120).

1938358272 is an abundant number, since it is smaller than the sum of its proper divisors (3231081968).

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

1938358272 is an frugal number, since it uses more digits than its factorization.

1938358272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9894 (or 9864 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 1938358272 is about 44026.7903894890. The cubic root of 1938358272 is about 1246.8417919913.

The spelling of 1938358272 in words is "one billion, nine hundred thirty-eight million, three hundred fifty-eight thousand, two hundred seventy-two".