1938742456 has 32 divisors (see below), whose sum is σ = 4161299040. Its totient is φ = 829519488.

The previous prime is 1938742453. The next prime is 1938742457. The reversal of 1938742456 is 6542478391.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938742451) 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, 6090 + ... + 62566.

It is an arithmetic number, because the mean of its divisors is an integer number (130040595).

Almost surely, 2^1938742456 is an apocalyptic number.

It is an amenable number.

1938742456 is an abundant number, since it is smaller than the sum of its proper divisors (2222556584).

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

1938742456 is a wasteful number, since it uses less digits than its factorization.

1938742456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57103 (or 57099 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The square root of 1938742456 is about 44031.1532440385. The cubic root of 1938742456 is about 1246.9241615288.

The spelling of 1938742456 in words is "one billion, nine hundred thirty-eight million, seven hundred forty-two thousand, four hundred fifty-six".