1985430 has 48 divisors (see below), whose sum is σ = 5083920. Its totient is φ = 496128.

The previous prime is 1985419. The next prime is 1985441. The reversal of 1985430 is 345891.

It is an interprime number because it is at equal distance from previous prime (1985419) and next prime (1985441).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8556 + ... + 8784.

It is an arithmetic number, because the mean of its divisors is an integer number (105915).

2^1985430 is an apocalyptic number.

1985430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1985430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2541960).

1985430 is an abundant number, since it is smaller than the sum of its proper divisors (3098490).

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

1985430 is a wasteful number, since it uses less digits than its factorization.

1985430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1985430 is about 1409.0528733869. The cubic root of 1985430 is about 125.6854081890.

It can be divided in two parts, 1985 and 430, that added together give a triangular number (2415 = T₆₉).

The spelling of 1985430 in words is "one million, nine hundred eighty-five thousand, four hundred thirty".