1389862646 has 16 divisors (see below), whose sum is σ = 2122552080. Its totient is φ = 682372320.

The previous prime is 1389862633. The next prime is 1389862679. The reversal of 1389862646 is 6462689831.

It is a super-2 number, since 2×1389862646² = 3863436349492242632, which contains 22 as substring.

It is a Curzon number.

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, 104780 + ... + 117296.

It is an arithmetic number, because the mean of its divisors is an integer number (132659505).

Almost surely, 2^1389862646 is an apocalyptic number.

1389862646 is a deficient number, since it is larger than the sum of its proper divisors (732689434).

1389862646 is a wasteful number, since it uses less digits than its factorization.

1389862646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13519.

The product of its digits is 2985984, while the sum is 53.

The square root of 1389862646 is about 37280.8616584971. The cubic root of 1389862646 is about 1115.9822685954.

The spelling of 1389862646 in words is "one billion, three hundred eighty-nine million, eight hundred sixty-two thousand, six hundred forty-six".