389878326 has 24 divisors (see below), whose sum is σ = 866718840. Its totient is φ = 129911076.

The previous prime is 389878319. The next prime is 389878337. The reversal of 389878326 is 623878983.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143755 + ... + 146441.

It is an arithmetic number, because the mean of its divisors is an integer number (36113285).

Almost surely, 2^389878326 is an apocalyptic number.

389878326 is an abundant number, since it is smaller than the sum of its proper divisors (476840514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

389878326 is an frugal number, since it uses more digits than its factorization.

389878326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5385 (or 2692 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 389878326 is about 19745.3368165752. The cubic root of 389878326 is about 730.5383693569.

Multiplying 389878326 by its sum of digits (54), we get a square (21053429604 = 145098²).

389878326 divided by its sum of digits (54) gives a square (7219969 = 2687²).

The spelling of 389878326 in words is "three hundred eighty-nine million, eight hundred seventy-eight thousand, three hundred twenty-six".