1938453768 has 48 divisors (see below), whose sum is σ = 5444428080. Its totient is φ = 646150608.

The previous prime is 1938453743. The next prime is 1938453773. The reversal of 1938453768 is 8673548391.

1938453768 is a `hidden beast` number, since 19 + 38 + 4 + 537 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 496630 + ... + 500517.

It is an arithmetic number, because the mean of its divisors is an integer number (113425585).

Almost surely, 2^1938453768 is an apocalyptic number.

1938453768 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1938453768 is an abundant number, since it is smaller than the sum of its proper divisors (3505974312).

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

1938453768 is an equidigital number, since it uses as much as digits as its factorization.

1938453768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997168 (or 997152 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 54.

The square root of 1938453768 is about 44027.8748976146. The cubic root of 1938453768 is about 1246.8622674713.

The spelling of 1938453768 in words is "one billion, nine hundred thirty-eight million, four hundred fifty-three thousand, seven hundred sixty-eight".