1388981948 has 6 divisors (see below), whose sum is σ = 2430718416. Its totient is φ = 694490972.

The previous prime is 1388981933. The next prime is 1388981977. The reversal of 1388981948 is 8491898831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173622740 + ... + 173622747.

It is an arithmetic number, because the mean of its divisors is an integer number (405119736).

Almost surely, 2^1388981948 is an apocalyptic number.

It is an amenable number.

1388981948 is a deficient number, since it is larger than the sum of its proper divisors (1041736468).

1388981948 is a wasteful number, since it uses less digits than its factorization.

1388981948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347245491 (or 347245489 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 59.

The square root of 1388981948 is about 37269.0481230739. The cubic root of 1388981948 is about 1115.7465016479.

The spelling of 1388981948 in words is "one billion, three hundred eighty-eight million, nine hundred eighty-one thousand, nine hundred forty-eight".