157638789 has 24 divisors (see below), whose sum is σ = 283887552. Its totient is φ = 81889920.

The previous prime is 157638779. The next prime is 157638821. The reversal of 157638789 is 987836751.

It is not a de Polignac number, because 157638789 - 2¹¹ = 157636741 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157638709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113044 + ... + 114429.

It is an arithmetic number, because the mean of its divisors is an integer number (11828648).

Almost surely, 2^157638789 is an apocalyptic number.

It is an amenable number.

157638789 is a deficient number, since it is larger than the sum of its proper divisors (126248763).

157638789 is a wasteful number, since it uses less digits than its factorization.

157638789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227497 (or 227494 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 157638789 is about 12555.4286665171. The cubic root of 157638789 is about 540.1997306430.

The spelling of 157638789 in words is "one hundred fifty-seven million, six hundred thirty-eight thousand, seven hundred eighty-nine".