1388028044 has 24 divisors (see below), whose sum is σ = 2706105360. Its totient is φ = 618537024.

The previous prime is 1388028029. The next prime is 1388028067. The reversal of 1388028044 is 4408208831.

It is a junction number, because it is equal to n+sod(n) for n = 1388027989 and 1388028007.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458714 + ... + 461729.

It is an arithmetic number, because the mean of its divisors is an integer number (112754390).

Almost surely, 2^1388028044 is an apocalyptic number.

It is an amenable number.

1388028044 is a deficient number, since it is larger than the sum of its proper divisors (1318077316).

1388028044 is a wasteful number, since it uses less digits than its factorization.

1388028044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920489 (or 920487 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 38.

The square root of 1388028044 is about 37256.2483886931. The cubic root of 1388028044 is about 1115.4910246562.

The spelling of 1388028044 in words is "one billion, three hundred eighty-eight million, twenty-eight thousand, forty-four".