1428408 has 64 divisors (see below), whose sum is σ = 4212000. Its totient is φ = 446976.

The previous prime is 1428389. The next prime is 1428409. The reversal of 1428408 is 8048241.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3478 + ... + 3866.

2^1428408 is an apocalyptic number.

1428408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1428408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2106000).

1428408 is an abundant number, since it is smaller than the sum of its proper divisors (2783592).

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

1428408 is a wasteful number, since it uses less digits than its factorization.

1428408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421 (or 411 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 1428408 is about 1195.1602403025. The cubic root of 1428408 is about 112.6204931220.

The spelling of 1428408 in words is "one million, four hundred twenty-eight thousand, four hundred eight".