1628402 has 8 divisors (see below), whose sum is σ = 2455596. Its totient is φ = 809872.

The previous prime is 1628401. The next prime is 1628441. The reversal of 1628402 is 2048261.

It can be written as a sum of positive squares in 2 ways, for example, as 1324801 + 303601 = 1151^2 + 551^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 12.

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, 1673 + ... + 2460.

2^1628402 is an apocalyptic number.

1628402 is a deficient number, since it is larger than the sum of its proper divisors (827194).

1628402 is a wasteful number, since it uses less digits than its factorization.

1628402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4332.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1628402 is about 1276.0885549209. The cubic root of 1628402 is about 117.6487206922.

It can be divided in two parts, 1628 and 402, that multiplied together give a palindrome (654456).

The spelling of 1628402 in words is "one million, six hundred twenty-eight thousand, four hundred two".