1390128 has 20 divisors (see below), whose sum is σ = 3591288. Its totient is φ = 463360.

The previous prime is 1390121. The next prime is 1390157. The reversal of 1390128 is 8210931.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 1390098 and 1390107.

It is not an unprimeable number, because it can be changed into a prime (1390121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14433 + ... + 14528.

2^1390128 is an apocalyptic number.

It is an amenable number.

1390128 is an abundant number, since it is smaller than the sum of its proper divisors (2201160).

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

1390128 is a wasteful number, since it uses less digits than its factorization.

1390128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28972 (or 28966 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1390128 is about 1179.0368950970. The cubic root of 1390128 is about 111.6053285569.

The spelling of 1390128 in words is "one million, three hundred ninety thousand, one hundred twenty-eight".