1628438 has 16 divisors (see below), whose sum is σ = 2860704. Its totient is φ = 680640.

The previous prime is 1628401. The next prime is 1628441. The reversal of 1628438 is 8348261.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 845 + ... + 1992.

It is an arithmetic number, because the mean of its divisors is an integer number (178794).

2^1628438 is an apocalyptic number.

1628438 is a deficient number, since it is larger than the sum of its proper divisors (1232266).

1628438 is a wasteful number, since it uses less digits than its factorization.

1628438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2887.

The product of its digits is 9216, while the sum is 32.

The square root of 1628438 is about 1276.1026604470. The cubic root of 1628438 is about 117.6495876613.

The spelling of 1628438 in words is "one million, six hundred twenty-eight thousand, four hundred thirty-eight".