1930838157 has 12 divisors (see below), whose sum is σ = 2789370844. Its totient is φ = 1287048960.

The previous prime is 1930838149. The next prime is 1930838167. The reversal of 1930838157 is 7518380391.

It can be written as a sum of positive squares in 2 ways, for example, as 80892036 + 1849946121 = 8994^2 + 43011^2 .

It is not a de Polignac number, because 1930838157 - 2³ = 1930838149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930838137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112413 + ... + 128445.

Almost surely, 2^1930838157 is an apocalyptic number.

It is an amenable number.

1930838157 is a deficient number, since it is larger than the sum of its proper divisors (858532687).

1930838157 is a wasteful number, since it uses less digits than its factorization.

1930838157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29420 (or 29417 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1930838157 is about 43941.3035423393. The cubic root of 1930838157 is about 1245.2272735522.

The spelling of 1930838157 in words is "one billion, nine hundred thirty million, eight hundred thirty-eight thousand, one hundred fifty-seven".