1388122000 has 40 divisors (see below), whose sum is σ = 3356483832. Its totient is φ = 555248000.

The previous prime is 1388121941. The next prime is 1388122027. The reversal of 1388122000 is 2218831.

It can be written as a sum of positive squares in 4 ways, for example, as 42406144 + 1345715856 = 6512^2 + 36684^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 345031 + ... + 349030.

Almost surely, 2^1388122000 is an apocalyptic number.

1388122000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1388122000 is an abundant number, since it is smaller than the sum of its proper divisors (1968361832).

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

1388122000 is an equidigital number, since it uses as much as digits as its factorization.

1388122000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694084 (or 694068 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1388122000 is about 37257.5093102048. The cubic root of 1388122000 is about 1115.5161933864.

The spelling of 1388122000 in words is "one billion, three hundred eighty-eight million, one hundred twenty-two thousand".