1980435 has 16 divisors (see below), whose sum is σ = 3271680. Its totient is φ = 1021920.

The previous prime is 1980431. The next prime is 1980443. The reversal of 1980435 is 5340891.

It is not a de Polignac number, because 1980435 - 2² = 1980431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1665 + ... + 2594.

It is an arithmetic number, because the mean of its divisors is an integer number (204480).

2^1980435 is an apocalyptic number.

1980435 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1980435 is a deficient number, since it is larger than the sum of its proper divisors (1291245).

1980435 is a wasteful number, since it uses less digits than its factorization.

1980435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4298.

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

The square root of 1980435 is about 1407.2792899777. The cubic root of 1980435 is about 125.5799187269.

It can be divided in two parts, 1980 and 435, that added together give a triangular number (2415 = T₆₉).

The spelling of 1980435 in words is "one million, nine hundred eighty thousand, four hundred thirty-five".