1938630 has 16 divisors (see below), whose sum is σ = 4652784. Its totient is φ = 516960.

The previous prime is 1938623. The next prime is 1938637. The reversal of 1938630 is 368391.

It is an interprime number because it is at equal distance from previous prime (1938623) and next prime (1938637).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 64621 = 1938630 / (1 + 9 + 3 + 8 + 6 + 3 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938637) 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 7 ways as a sum of consecutive naturals, for example, 32281 + ... + 32340.

It is an arithmetic number, because the mean of its divisors is an integer number (290799).

2^1938630 is an apocalyptic number.

1938630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1938630 is an abundant number, since it is smaller than the sum of its proper divisors (2714154).

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

1938630 is a wasteful number, since it uses less digits than its factorization.

1938630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64631.

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

The square root of 1938630 is about 1392.3469395233. The cubic root of 1938630 is about 124.6900051946.

The spelling of 1938630 in words is "one million, nine hundred thirty-eight thousand, six hundred thirty".