1388796442 has 64 divisors (see below), whose sum is σ = 2425365504. Its totient is φ = 590275840.

The previous prime is 1388796439. The next prime is 1388796463. The reversal of 1388796442 is 2446978831.

It is a self number, because there is not a number n which added to its sum of digits gives 1388796442.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6117933 + ... + 6118159.

It is an arithmetic number, because the mean of its divisors is an integer number (37896336).

Almost surely, 2^1388796442 is an apocalyptic number.

1388796442 is a deficient number, since it is larger than the sum of its proper divisors (1036569062).

1388796442 is a wasteful number, since it uses less digits than its factorization.

1388796442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483.

The product of its digits is 2322432, while the sum is 52.

The square root of 1388796442 is about 37266.5592991894. The cubic root of 1388796442 is about 1115.6968281236.

The spelling of 1388796442 in words is "one billion, three hundred eighty-eight million, seven hundred ninety-six thousand, four hundred forty-two".