1388922120 has 64 divisors (see below), whose sum is σ = 4629744000. Its totient is φ = 370378944.

The previous prime is 1388922113. The next prime is 1388922121. The reversal of 1388922120 is 212298831.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1388922121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 641940 + ... + 644099.

It is an arithmetic number, because the mean of its divisors is an integer number (72339750).

Almost surely, 2^1388922120 is an apocalyptic number.

1388922120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388922120 is an abundant number, since it is smaller than the sum of its proper divisors (3240821880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1388922120 is a wasteful number, since it uses less digits than its factorization.

1388922120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286059 (or 1286049 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1388922120 is about 37268.2454644702. The cubic root of 1388922120 is about 1115.7304817996.

The spelling of 1388922120 in words is "one billion, three hundred eighty-eight million, nine hundred twenty-two thousand, one hundred twenty".