386073621 has 20 divisors (see below), whose sum is σ = 610654572. Its totient is φ = 242241408.

The previous prime is 386073617. The next prime is 386073641. The reversal of 386073621 is 126370683.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 221592996 + 164480625 = 14886^2 + 12825^2 .

It is not a de Polignac number, because 386073621 - 2² = 386073617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (386073641) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 138810 + ... + 141563.

Almost surely, 2^386073621 is an apocalyptic number.

It is an amenable number.

386073621 is a deficient number, since it is larger than the sum of its proper divisors (224580951).

386073621 is a wasteful number, since it uses less digits than its factorization.

386073621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280402 (or 280393 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 386073621 is about 19648.7562201784. The cubic root of 386073621 is about 728.1542292134.

The spelling of 386073621 in words is "three hundred eighty-six million, seventy-three thousand, six hundred twenty-one".