1930638 has 16 divisors (see below), whose sum is σ = 3880656. Its totient is φ = 640320.

The previous prime is 1930633. The next prime is 1930667. The reversal of 1930638 is 8360391.

It is a super-3 number, since 3×1930638³ = 21588566446933362216, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708 + ... + 2088.

It is an arithmetic number, because the mean of its divisors is an integer number (242541).

2^1930638 is an apocalyptic number.

1930638 is an abundant number, since it is smaller than the sum of its proper divisors (1950018).

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

1930638 is a wasteful number, since it uses less digits than its factorization.

1930638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 1930638 is about 1389.4740011961. The cubic root of 1930638 is about 124.5184243954.

The spelling of 1930638 in words is "one million, nine hundred thirty thousand, six hundred thirty-eight".