38157986 has 8 divisors (see below), whose sum is σ = 58317084. Its totient is φ = 18718960.

The previous prime is 38157971. The next prime is 38157991. The reversal of 38157986 is 68975183.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 34281025 + 3876961 = 5855^2 + 1969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 38157986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179885 + ... + 180096.

Almost surely, 2^38157986 is an apocalyptic number.

38157986 is a deficient number, since it is larger than the sum of its proper divisors (20159098).

38157986 is a wasteful number, since it uses less digits than its factorization.

38157986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360036.

The product of its digits is 362880, while the sum is 47.

The square root of 38157986 is about 6177.2150682974. The cubic root of 38157986 is about 336.6628131877.

The spelling of 38157986 in words is "thirty-eight million, one hundred fifty-seven thousand, nine hundred eighty-six".