451323990 has 96 divisors (see below), whose sum is σ = 1338101856. Its totient is φ = 104555520.

The previous prime is 451323989. The next prime is 451324021. The reversal of 451323990 is 99323154.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8545 + ... + 31235.

It is an arithmetic number, because the mean of its divisors is an integer number (13938561).

Almost surely, 2^451323990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451323990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669050928).

451323990 is an abundant number, since it is smaller than the sum of its proper divisors (886777866).

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

451323990 is a wasteful number, since it uses less digits than its factorization.

451323990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22734 (or 22731 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 451323990 is about 21244.3872587561. The cubic root of 451323990 is about 767.0602417345.

The spelling of 451323990 in words is "four hundred fifty-one million, three hundred twenty-three thousand, nine hundred ninety".