1938431088 has 200 divisors, whose sum is σ = 6157641600. Its totient is φ = 583839360.

The previous prime is 1938431059. The next prime is 1938431101. The reversal of 1938431088 is 8801348391.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3235813 + ... + 3236411.

It is an arithmetic number, because the mean of its divisors is an integer number (30788208).

Almost surely, 2^1938431088 is an apocalyptic number.

1938431088 is a gapful number since it is divisible by the number (18) 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 1938431088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3078820800).

1938431088 is an abundant number, since it is smaller than the sum of its proper divisors (4219210512).

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

1938431088 is a wasteful number, since it uses less digits than its factorization.

1938431088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1938431088 is about 44027.6173327606. The cubic root of 1938431088 is about 1246.8574046700.

The spelling of 1938431088 in words is "one billion, nine hundred thirty-eight million, four hundred thirty-one thousand, eighty-eight".