389956403 has 6 divisors (see below), whose sum is σ = 394961364. Its totient is φ = 385014084.

The previous prime is 389956373. The next prime is 389956423. The reversal of 389956403 is 304659983.

It is not a de Polignac number, because 389956403 - 2⁶ = 389956339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389956423) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25001 + ... + 37482.

It is an arithmetic number, because the mean of its divisors is an integer number (65826894).

Almost surely, 2^389956403 is an apocalyptic number.

389956403 is a deficient number, since it is larger than the sum of its proper divisors (5004961).

389956403 is an frugal number, since it uses more digits than its factorization.

389956403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62641 (or 62562 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 389956403 is about 19747.3138173272. The cubic root of 389956403 is about 730.5871319523.

The spelling of 389956403 in words is "three hundred eighty-nine million, nine hundred fifty-six thousand, four hundred three".