1388220862 has 12 divisors (see below), whose sum is σ = 2422303920. Its totient is φ = 594951756.

The previous prime is 1388220851. The next prime is 1388220881. The reversal of 1388220862 is 2680228831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7082662 + ... + 7082857.

It is an arithmetic number, because the mean of its divisors is an integer number (201858660).

Almost surely, 2^1388220862 is an apocalyptic number.

1388220862 is a deficient number, since it is larger than the sum of its proper divisors (1034083058).

1388220862 is a wasteful number, since it uses less digits than its factorization.

1388220862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14165535 (or 14165528 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 1388220862 is about 37258.8360258342. The cubic root of 1388220862 is about 1115.5426750991.

The spelling of 1388220862 in words is "one billion, three hundred eighty-eight million, two hundred twenty thousand, eight hundred sixty-two".