451940 has 24 divisors (see below), whose sum is σ = 967680. Its totient is φ = 177248.

The previous prime is 451939. The next prime is 451961. The reversal of 451940 is 49154.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 989 + ... + 1371.

It is an arithmetic number, because the mean of its divisors is an integer number (40320).

2⁴⁵¹⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

451940 is an abundant number, since it is smaller than the sum of its proper divisors (515740).

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

451940 is a wasteful number, since it uses less digits than its factorization.

451940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 451940 is about 672.2648287691. The cubic root of 451940 is about 76.7409068722.

The spelling of 451940 in words is "four hundred fifty-one thousand, nine hundred forty".