38722157 has 4 divisors (see below), whose sum is σ = 38790780. Its totient is φ = 38653536.

The previous prime is 38722153. The next prime is 38722183. The reversal of 38722157 is 75122783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7070281 + 31651876 = 2659^2 + 5626^2 .

It is a cyclic number.

It is not a de Polignac number, because 38722157 - 2² = 38722153 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 (38722153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33458 + ... + 34595.

It is an arithmetic number, because the mean of its divisors is an integer number (9697695).

Almost surely, 2^38722157 is an apocalyptic number.

It is an amenable number.

38722157 is a deficient number, since it is larger than the sum of its proper divisors (68623).

38722157 is an equidigital number, since it uses as much as digits as its factorization.

38722157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68622.

The product of its digits is 23520, while the sum is 35.

The square root of 38722157 is about 6222.7129935423. The cubic root of 38722157 is about 338.3139043149.

The spelling of 38722157 in words is "thirty-eight million, seven hundred twenty-two thousand, one hundred fifty-seven".