1938157 has 16 divisors (see below), whose sum is σ = 2222640. Its totient is φ = 1677312.

The previous prime is 1938149. The next prime is 1938161. The reversal of 1938157 is 7518391.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 17161 + 1920996 = 131^2 + 1386^2 .

It is not a de Polignac number, because 1938157 - 2³ = 1938149 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 (1938197) 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 15 ways as a sum of consecutive naturals, for example, 19933 + ... + 20029.

It is an arithmetic number, because the mean of its divisors is an integer number (138915).

2^1938157 is an apocalyptic number.

It is an amenable number.

1938157 is a deficient number, since it is larger than the sum of its proper divisors (284483).

1938157 is a wasteful number, since it uses less digits than its factorization.

1938157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192.

The product of its digits is 7560, while the sum is 34.

The square root of 1938157 is about 1392.1770720709. The cubic root of 1938157 is about 124.6798634674.

The spelling of 1938157 in words is "one million, nine hundred thirty-eight thousand, one hundred fifty-seven".