1389813628 has 24 divisors (see below), whose sum is σ = 2780446592. Its totient is φ = 595458864.

The previous prime is 1389813611. The next prime is 1389813637. The reversal of 1389813628 is 8263189831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145075 + ... + 154357.

Almost surely, 2^1389813628 is an apocalyptic number.

It is an amenable number.

1389813628 is an abundant number, since it is smaller than the sum of its proper divisors (1390632964).

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

1389813628 is a wasteful number, since it uses less digits than its factorization.

1389813628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14641 (or 14639 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 1389813628 is about 37280.2042376380. The cubic root of 1389813628 is about 1115.9691488669.

The spelling of 1389813628 in words is "one billion, three hundred eighty-nine million, eight hundred thirteen thousand, six hundred twenty-eight".