1390328238 has 128 divisors (see below), whose sum is σ = 3309465600. Its totient is φ = 385320960.

The previous prime is 1390328209. The next prime is 1390328239. The reversal of 1390328238 is 8328230931.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1390328196 and 1390328205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1390328239) 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 63 ways as a sum of consecutive naturals, for example, 6124681 + ... + 6124907.

It is an arithmetic number, because the mean of its divisors is an integer number (25855200).

Almost surely, 2^1390328238 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1390328238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1654732800).

1390328238 is an abundant number, since it is smaller than the sum of its proper divisors (1919137362).

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

1390328238 is a wasteful number, since it uses less digits than its factorization.

1390328238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 1390328238 is about 37287.1055192006. The cubic root of 1390328238 is about 1116.1068694949.

The spelling of 1390328238 in words is "one billion, three hundred ninety million, three hundred twenty-eight thousand, two hundred thirty-eight".