451987998 has 192 divisors, whose sum is σ = 1242071040. Its totient is φ = 106920000.

The previous prime is 451987969. The next prime is 451988021. The reversal of 451987998 is 899789154.

451987998 is nontrivially palindromic in base 13.

Its product of digits (6531840) is a multiple of the sum of its prime divisors (224).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2993223 + ... + 2993373.

It is an arithmetic number, because the mean of its divisors is an integer number (6469120).

Almost surely, 2^451987998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451987998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621035520).

451987998 is an abundant number, since it is smaller than the sum of its proper divisors (790083042).

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

451987998 is a wasteful number, since it uses less digits than its factorization.

451987998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 224 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 60.

The square root of 451987998 is about 21260.0093602990. The cubic root of 451987998 is about 767.4362351577.

The spelling of 451987998 in words is "four hundred fifty-one million, nine hundred eighty-seven thousand, nine hundred ninety-eight".