38207421 has 36 divisors (see below), whose sum is σ = 64969632. Its totient is φ = 21194784.

The previous prime is 38207401. The next prime is 38207431. The reversal of 38207421 is 12470283.

38207421 is a `hidden beast` number, since 38 + 207 + 421 = 666.

It is not a de Polignac number, because 38207421 - 2¹¹ = 38205373 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 (38207401) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 86026 + ... + 86468.

It is an arithmetic number, because the mean of its divisors is an integer number (1804712).

Almost surely, 2^38207421 is an apocalyptic number.

It is an amenable number.

38207421 is a deficient number, since it is larger than the sum of its proper divisors (26762211).

38207421 is a wasteful number, since it uses less digits than its factorization.

38207421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 38207421 is about 6181.2151717927. The cubic root of 38207421 is about 336.8081365824.

The spelling of 38207421 in words is "thirty-eight million, two hundred seven thousand, four hundred twenty-one".