1890432 has 64 divisors (see below), whose sum is σ = 5589600. Its totient is φ = 628992.

The previous prime is 1890403. The next prime is 1890467. The reversal of 1890432 is 2340981.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 1890396 and 1890405.

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, 3183 + ... + 3729.

2^1890432 is an apocalyptic number.

1890432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1890432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2794800).

1890432 is an abundant number, since it is smaller than the sum of its proper divisors (3699168).

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

1890432 is an equidigital number, since it uses as much as digits as its factorization.

1890432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1890432 is about 1374.9298163906. The cubic root of 1890432 is about 123.6479783573.

The spelling of 1890432 in words is "one million, eight hundred ninety thousand, four hundred thirty-two".