1389849566 has 32 divisors (see below), whose sum is σ = 2521248768. Its totient is φ = 561718080.

The previous prime is 1389849553. The next prime is 1389849577. The reversal of 1389849566 is 6659489831.

It is a super-2 number, since 2×1389849566² = 3863363632220776712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7535 + ... + 53258.

It is an arithmetic number, because the mean of its divisors is an integer number (78789024).

Almost surely, 2^1389849566 is an apocalyptic number.

1389849566 is a deficient number, since it is larger than the sum of its proper divisors (1131399202).

1389849566 is a wasteful number, since it uses less digits than its factorization.

1389849566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60896.

The product of its digits is 11197440, while the sum is 59.

The square root of 1389849566 is about 37280.6862329545. The cubic root of 1389849566 is about 1115.9787677474.

The spelling of 1389849566 in words is "one billion, three hundred eighty-nine million, eight hundred forty-nine thousand, five hundred sixty-six".