273990 has 16 divisors (see below), whose sum is σ = 657648. Its totient is φ = 73056.

The previous prime is 273979. The next prime is 273997. The reversal of 273990 is 99372.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 9133 = 273990 / (2 + 7 + 3 + 9 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (273997) by changing a digit.

273990 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4537 + ... + 4596.

It is an arithmetic number, because the mean of its divisors is an integer number (41103).

2²⁷³⁹⁹⁰ is an apocalyptic number.

273990 is an abundant number, since it is smaller than the sum of its proper divisors (383658).

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

273990 is a wasteful number, since it uses less digits than its factorization.

273990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9143.

The product of its (nonzero) digits is 3402, while the sum is 30.

The square root of 273990 is about 523.4405410359. The cubic root of 273990 is about 64.9498627176.

The spelling of 273990 in words is "two hundred seventy-three thousand, nine hundred ninety".