38157723 has 20 divisors (see below), whose sum is σ = 57185568. Its totient is φ = 25356240.

The previous prime is 38157701. The next prime is 38157731. The reversal of 38157723 is 32775183.

38157723 is a `hidden beast` number, since 3 + 81 + 577 + 2 + 3 = 666.

It is not a de Polignac number, because 38157723 - 2⁶ = 38157659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (38157793) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34365 + ... + 35457.

Almost surely, 2^38157723 is an apocalyptic number.

38157723 is a deficient number, since it is larger than the sum of its proper divisors (19027845).

38157723 is a wasteful number, since it uses less digits than its factorization.

38157723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536 (or 1527 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 38157723 is about 6177.1937803504. The cubic root of 38157723 is about 336.6620397146.

The spelling of 38157723 in words is "thirty-eight million, one hundred fifty-seven thousand, seven hundred twenty-three".