38422421 has 2 divisors, whose sum is σ = 38422422. Its totient is φ = 38422420.

The previous prime is 38422411. The next prime is 38422429. The reversal of 38422421 is 12422483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22221796 + 16200625 = 4714^2 + 4025^2 .

It is a cyclic number.

It is not a de Polignac number, because 38422421 - 2¹⁸ = 38160277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38422429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19211210 + 19211211.

It is an arithmetic number, because the mean of its divisors is an integer number (19211211).

Almost surely, 2^38422421 is an apocalyptic number.

It is an amenable number.

38422421 is a deficient number, since it is larger than the sum of its proper divisors (1).

38422421 is an equidigital number, since it uses as much as digits as its factorization.

38422421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3072, while the sum is 26.

The square root of 38422421 is about 6198.5821765949. The cubic root of 38422421 is about 337.4387151640.

The spelling of 38422421 in words is "thirty-eight million, four hundred twenty-two thousand, four hundred twenty-one".