1938791502 has 48 divisors (see below), whose sum is σ = 4462458000. Its totient is φ = 606621312.

The previous prime is 1938791497. The next prime is 1938791513. The reversal of 1938791502 is 2051978391.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11274 + ... + 63282.

It is an arithmetic number, because the mean of its divisors is an integer number (92967875).

Almost surely, 2^1938791502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1938791502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2231229000).

1938791502 is an abundant number, since it is smaller than the sum of its proper divisors (2523666498).

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

1938791502 is a wasteful number, since it uses less digits than its factorization.

1938791502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52145 (or 52142 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1938791502 is about 44031.7101870913. The cubic root of 1938791502 is about 1246.9346762702.

It can be divided in two parts, 19387 and 91502, that added together give a square (110889 = 333²).

The spelling of 1938791502 in words is "one billion, nine hundred thirty-eight million, seven hundred ninety-one thousand, five hundred two".