1990260 has 36 divisors (see below), whose sum is σ = 6037668. Its totient is φ = 530688.

The previous prime is 1990253. The next prime is 1990273. The reversal of 1990260 is 620991.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 535824 + 1454436 = 732^2 + 1206^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1990260² = 7922269735200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5349 + ... + 5708.

It is an arithmetic number, because the mean of its divisors is an integer number (167713).

2^1990260 is an apocalyptic number.

1990260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1990260 is an abundant number, since it is smaller than the sum of its proper divisors (4047408).

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

1990260 is a wasteful number, since it uses less digits than its factorization.

1990260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11072 (or 11067 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 1990260 is about 1410.7657495134. The cubic root of 1990260 is about 125.7872448887.

The spelling of 1990260 in words is "one million, nine hundred ninety thousand, two hundred sixty".