1388207950 has 24 divisors (see below), whose sum is σ = 2590506072. Its totient is φ = 553468320.

The previous prime is 1388207939. The next prime is 1388207957. The reversal of 1388207950 is 597028831.

It is a junction number, because it is equal to n+sod(n) for n = 1388207897 and 1388207906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388207957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29869 + ... + 60568.

It is an arithmetic number, because the mean of its divisors is an integer number (107937753).

Almost surely, 2^1388207950 is an apocalyptic number.

1388207950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388207950 is a deficient number, since it is larger than the sum of its proper divisors (1202298122).

1388207950 is a wasteful number, since it uses less digits than its factorization.

1388207950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90756 (or 90751 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1388207950 is about 37258.6627510972. The cubic root of 1388207950 is about 1115.5392164920.

The spelling of 1388207950 in words is "one billion, three hundred eighty-eight million, two hundred seven thousand, nine hundred fifty".