389961429 has 32 divisors (see below), whose sum is σ = 612737664. Its totient is φ = 217486080.

The previous prime is 389961427. The next prime is 389961433. The reversal of 389961429 is 924169983.

It is not a de Polignac number, because 389961429 - 2¹ = 389961427 is a prime.

It is a super-2 number, since 2×389961429² = 304139832215444082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (389961427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158799 + ... + 161235.

It is an arithmetic number, because the mean of its divisors is an integer number (19148052).

Almost surely, 2^389961429 is an apocalyptic number.

389961429 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

389961429 is a deficient number, since it is larger than the sum of its proper divisors (222776235).

389961429 is a wasteful number, since it uses less digits than its factorization.

389961429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2837.

The product of its digits is 839808, while the sum is 51.

The square root of 389961429 is about 19747.4410747317. The cubic root of 389961429 is about 730.5902706922.

The spelling of 389961429 in words is "three hundred eighty-nine million, nine hundred sixty-one thousand, four hundred twenty-nine".