1928143938 has 64 divisors (see below), whose sum is σ = 4566481920. Its totient is φ = 531048000.

The previous prime is 1928143907. The next prime is 1928143969. The reversal of 1928143938 is 8393418291.

It is an interprime number because it is at equal distance from previous prime (1928143907) and next prime (1928143969).

It is a super-2 number, since 2×1928143938² = 7435478091292295688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1328113 + ... + 1329563.

It is an arithmetic number, because the mean of its divisors is an integer number (71351280).

Almost surely, 2^1928143938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1928143938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2283240960).

1928143938 is an abundant number, since it is smaller than the sum of its proper divisors (2638337982).

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

1928143938 is a wasteful number, since it uses less digits than its factorization.

1928143938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2583.

The product of its digits is 373248, while the sum is 48.

The square root of 1928143938 is about 43910.6358186715. The cubic root of 1928143938 is about 1244.6478228408.

The spelling of 1928143938 in words is "one billion, nine hundred twenty-eight million, one hundred forty-three thousand, nine hundred thirty-eight".