38223857 has 4 divisors (see below), whose sum is σ = 43684416. Its totient is φ = 32763300.

The previous prime is 38223851. The next prime is 38223863. The reversal of 38223857 is 75832283.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (38223851) and next prime (38223863).

It is a cyclic number.

It is not a de Polignac number, because 38223857 - 2⁴ = 38223841 is a prime.

It is a super-2 number, since 2×38223857² = 2922126487912898, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38223857.

It is not an unprimeable number, because it can be changed into a prime (38223851) 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, 2730269 + ... + 2730282.

It is an arithmetic number, because the mean of its divisors is an integer number (10921104).

Almost surely, 2^38223857 is an apocalyptic number.

It is an amenable number.

38223857 is a deficient number, since it is larger than the sum of its proper divisors (5460559).

38223857 is an equidigital number, since it uses as much as digits as its factorization.

38223857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5460558.

The product of its digits is 80640, while the sum is 38.

The square root of 38223857 is about 6182.5445408828. The cubic root of 38223857 is about 336.8564254992.

The spelling of 38223857 in words is "thirty-eight million, two hundred twenty-three thousand, eight hundred fifty-seven".