1389878854 has 64 divisors (see below), whose sum is σ = 2612736000. Its totient is φ = 539918208.

The previous prime is 1389878851. The next prime is 1389878879. The reversal of 1389878854 is 4588789831.

It is a junction number, because it is equal to n+sod(n) for n = 1389878792 and 1389878801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389878851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2901387 + ... + 2901865.

It is an arithmetic number, because the mean of its divisors is an integer number (40824000).

Almost surely, 2^1389878854 is an apocalyptic number.

1389878854 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1389878854 is a deficient number, since it is larger than the sum of its proper divisors (1222857146).

1389878854 is a wasteful number, since it uses less digits than its factorization.

1389878854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757.

The product of its digits is 15482880, while the sum is 61.

The square root of 1389878854 is about 37281.0790348134. The cubic root of 1389878854 is about 1115.9866066189.

The spelling of 1389878854 in words is "one billion, three hundred eighty-nine million, eight hundred seventy-eight thousand, eight hundred fifty-four".