38357421 has 4 divisors (see below), whose sum is σ = 51143232. Its totient is φ = 25571612.

The previous prime is 38357377. The next prime is 38357443. The reversal of 38357421 is 12475383.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12475383 = 3 ⋅4158461.

It is a cyclic number.

It is not a de Polignac number, because 38357421 - 2⁶ = 38357357 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 (38357461) 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, 6392901 + ... + 6392906.

It is an arithmetic number, because the mean of its divisors is an integer number (12785808).

Almost surely, 2^38357421 is an apocalyptic number.

It is an amenable number.

38357421 is a deficient number, since it is larger than the sum of its proper divisors (12785811).

38357421 is a wasteful number, since it uses less digits than its factorization.

38357421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12785810.

The product of its digits is 20160, while the sum is 33.

The square root of 38357421 is about 6193.3368227475. The cubic root of 38357421 is about 337.2483237553.

The spelling of 38357421 in words is "thirty-eight million, three hundred fifty-seven thousand, four hundred twenty-one".