38706021 has 24 divisors (see below), whose sum is σ = 59099040. Its totient is φ = 24343200.

The previous prime is 38706013. The next prime is 38706029. The reversal of 38706021 is 12060783.

It is an interprime number because it is at equal distance from previous prime (38706013) and next prime (38706029).

It is not a de Polignac number, because 38706021 - 2³ = 38706013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38706029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 78586 + ... + 79076.

It is an arithmetic number, because the mean of its divisors is an integer number (2462460).

Almost surely, 2^38706021 is an apocalyptic number.

It is an amenable number.

38706021 is a deficient number, since it is larger than the sum of its proper divisors (20393019).

38706021 is a wasteful number, since it uses less digits than its factorization.

38706021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 974 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 38706021 is about 6221.4163178492. The cubic root of 38706021 is about 338.2669045948.

The spelling of 38706021 in words is "thirty-eight million, seven hundred six thousand, twenty-one".