1388863948 has 24 divisors (see below), whose sum is σ = 2456842752. Its totient is φ = 686924304.

The previous prime is 1388863937. The next prime is 1388863951. The reversal of 1388863948 is 8493688831.

It is a junction number, because it is equal to n+sod(n) for n = 1388863892 and 1388863901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611511 + ... + 613777.

It is an arithmetic number, because the mean of its divisors is an integer number (102368448).

Almost surely, 2^1388863948 is an apocalyptic number.

It is an amenable number.

1388863948 is a deficient number, since it is larger than the sum of its proper divisors (1067978804).

1388863948 is a wasteful number, since it uses less digits than its factorization.

1388863948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3861 (or 3859 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 58.

The square root of 1388863948 is about 37267.4650063564. The cubic root of 1388863948 is about 1115.7149049292.

The spelling of 1388863948 in words is "one billion, three hundred eighty-eight million, eight hundred sixty-three thousand, nine hundred forty-eight".