1380428 has 18 divisors (see below), whose sum is σ = 2810556. Its totient is φ = 591528.

The previous prime is 1380427. The next prime is 1380439. The reversal of 1380428 is 8240831.

It is a junction number, because it is equal to n+sod(n) for n = 1380397 and 1380406.

It is not an unprimeable number, because it can be changed into a prime (1380427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3326 + ... + 3717.

It is an arithmetic number, because the mean of its divisors is an integer number (156142).

2^1380428 is an apocalyptic number.

It is an amenable number.

1380428 is an abundant number, since it is smaller than the sum of its proper divisors (1430128).

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

1380428 is a wasteful number, since it uses less digits than its factorization.

1380428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7061 (or 7052 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 1380428 is about 1174.9161672222. The cubic root of 1380428 is about 111.3451368157.

The spelling of 1380428 in words is "one million, three hundred eighty thousand, four hundred twenty-eight".