1990270 has 16 divisors (see below), whose sum is σ = 3706560. Its totient is φ = 768544.

The previous prime is 1990253. The next prime is 1990273. The reversal of 1990270 is 720991.

It is a super-2 number, since 2×1990270² = 7922349345800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3142 + ... + 3721.

It is an arithmetic number, because the mean of its divisors is an integer number (231660).

2^1990270 is an apocalyptic number.

1990270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1990270 is a deficient number, since it is larger than the sum of its proper divisors (1716290).

1990270 is a wasteful number, since it uses less digits than its factorization.

1990270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6899.

The product of its (nonzero) digits is 1134, while the sum is 28.

The square root of 1990270 is about 1410.7692936834. The cubic root of 1990270 is about 125.7874555597.

The spelling of 1990270 in words is "one million, nine hundred ninety thousand, two hundred seventy".