1628408 has 16 divisors (see below), whose sum is σ = 3159000. Its totient is φ = 786016.

The previous prime is 1628401. The next prime is 1628441. The reversal of 1628408 is 8048261.

It is a super-2 number, since 2×1628408² = 5303425228928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1628401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3278 + ... + 3741.

2^1628408 is an apocalyptic number.

It is an amenable number.

1628408 is a deficient number, since it is larger than the sum of its proper divisors (1530592).

1628408 is a wasteful number, since it uses less digits than its factorization.

1628408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054 (or 7050 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 1628408 is about 1276.0909058527. The cubic root of 1628408 is about 117.6488651880.

The spelling of 1628408 in words is "one million, six hundred twenty-eight thousand, four hundred eight".