38421457 has 4 divisors (see below), whose sum is σ = 38440116. Its totient is φ = 38402800.

The previous prime is 38421443. The next prime is 38421463. The reversal of 38421457 is 75412483.

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 19793601 + 18627856 = 4449^2 + 4316^2 .

It is a cyclic number.

It is not a de Polignac number, because 38421457 - 2¹⁵ = 38388689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38421157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5794 + ... + 10507.

It is an arithmetic number, because the mean of its divisors is an integer number (9610029).

Almost surely, 2^38421457 is an apocalyptic number.

It is an amenable number.

38421457 is a deficient number, since it is larger than the sum of its proper divisors (18659).

38421457 is a wasteful number, since it uses less digits than its factorization.

38421457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18658.

The product of its digits is 26880, while the sum is 34.

The square root of 38421457 is about 6198.5044163895. The cubic root of 38421457 is about 337.4358930822.

The spelling of 38421457 in words is "thirty-eight million, four hundred twenty-one thousand, four hundred fifty-seven".