1428940 has 24 divisors (see below), whose sum is σ = 3083472. Its totient is φ = 555840.

The previous prime is 1428937. The next prime is 1428949. The reversal of 1428940 is 498241.

It is a junction number, because it is equal to n+sod(n) for n = 1428899 and 1428908.

It is not an unprimeable number, because it can be changed into a prime (1428949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226 + ... + 1705.

It is an arithmetic number, because the mean of its divisors is an integer number (128478).

2^1428940 is an apocalyptic number.

1428940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1428940 is an abundant number, since it is smaller than the sum of its proper divisors (1654532).

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

1428940 is a wasteful number, since it uses less digits than its factorization.

1428940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977 (or 1975 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1428940 is about 1195.3827838814. The cubic root of 1428940 is about 112.6344729433.

The spelling of 1428940 in words is "one million, four hundred twenty-eight thousand, nine hundred forty".