1990548 has 48 divisors (see below), whose sum is σ = 5900160. Its totient is φ = 568512.

The previous prime is 1990543. The next prime is 1990553. The reversal of 1990548 is 8450991.

It is an interprime number because it is at equal distance from previous prime (1990543) and next prime (1990553).

It is a super-3 number, since 3×1990548³ = 23661333592138339776, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990543) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 561 + ... + 2072.

It is an arithmetic number, because the mean of its divisors is an integer number (122920).

2^1990548 is an apocalyptic number.

1990548 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1990548 is an abundant number, since it is smaller than the sum of its proper divisors (3909612).

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

1990548 is a wasteful number, since it uses less digits than its factorization.

1990548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653 (or 2645 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1990548 is about 1410.8678180468. The cubic root of 1990548 is about 125.7933119318.

The spelling of 1990548 in words is "one million, nine hundred ninety thousand, five hundred forty-eight".