1889742 has 8 divisors (see below), whose sum is σ = 3779496. Its totient is φ = 629912.

The previous prime is 1889717. The next prime is 1889743. The reversal of 1889742 is 2479881.

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

1889742 is an admirable number.

It is a super-2 number, since 2×1889742² = 7142249653128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1889742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889743) 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 3 ways as a sum of consecutive naturals, for example, 157473 + ... + 157484.

It is an arithmetic number, because the mean of its divisors is an integer number (472437).

2^1889742 is an apocalyptic number.

1889742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1889742 is a wasteful number, since it uses less digits than its factorization.

1889742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314962.

The product of its digits is 32256, while the sum is 39.

The square root of 1889742 is about 1374.6788715915. The cubic root of 1889742 is about 123.6329328567.

The spelling of 1889742 in words is "one million, eight hundred eighty-nine thousand, seven hundred forty-two".