1934538390 has 160 divisors (see below), whose sum is σ = 5506506720. Its totient is φ = 485968896.

The previous prime is 1934538379. The next prime is 1934538413. The reversal of 1934538390 is 938354391.

1934538390 is a `hidden beast` number, since 193 + 45 + 38 + 390 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5186244 + ... + 5186616.

It is an arithmetic number, because the mean of its divisors is an integer number (34415667).

Almost surely, 2^1934538390 is an apocalyptic number.

1934538390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1934538390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2753253360).

1934538390 is an abundant number, since it is smaller than the sum of its proper divisors (3571968330).

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

1934538390 is a wasteful number, since it uses less digits than its factorization.

1934538390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 1934538390 is about 43983.3876594334. The cubic root of 1934538390 is about 1246.0222117208.

The spelling of 1934538390 in words is "one billion, nine hundred thirty-four million, five hundred thirty-eight thousand, three hundred ninety".