389961428 has 6 divisors (see below), whose sum is σ = 682432506. Its totient is φ = 194980712.

The previous prime is 389961427. The next prime is 389961433. The reversal of 389961428 is 824169983.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 271195024 + 118766404 = 16468^2 + 10898^2 .

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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48745175 + ... + 48745182.

It is an arithmetic number, because the mean of its divisors is an integer number (113738751).

Almost surely, 2^389961428 is an apocalyptic number.

It is an amenable number.

389961428 is a deficient number, since it is larger than the sum of its proper divisors (292471078).

389961428 is a wasteful number, since it uses less digits than its factorization.

389961428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97490361 (or 97490359 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The square root of 389961428 is about 19747.4410494119. The cubic root of 389961428 is about 730.5902700677.

The spelling of 389961428 in words is "three hundred eighty-nine million, nine hundred sixty-one thousand, four hundred twenty-eight".