453990 has 32 divisors (see below), whose sum is σ = 1121760. Its totient is φ = 117504.

The previous prime is 453983. The next prime is 453991. The reversal of 453990 is 99354.

453990 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×453990² = 412213840200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (453991) by changing a digit.

453990 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 15 ways as a sum of consecutive naturals, for example, 906 + ... + 1314.

It is an arithmetic number, because the mean of its divisors is an integer number (35055).

2⁴⁵³⁹⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 453990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (560880).

453990 is an abundant number, since it is smaller than the sum of its proper divisors (667770).

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

453990 is a wasteful number, since it uses less digits than its factorization.

453990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 453990 is about 673.7878004238. The cubic root of 453990 is about 76.8567641325.

The spelling of 453990 in words is "four hundred fifty-three thousand, nine hundred ninety".