451998812 has 24 divisors (see below), whose sum is σ = 809040960. Its totient is φ = 220858880.

The previous prime is 451998803. The next prime is 451998821. The reversal of 451998812 is 218899154.

It is an interprime number because it is at equal distance from previous prime (451998803) and next prime (451998821).

It is a super-2 number, since 2×451998812² = 408605852098822688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent 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, 164264 + ... + 166992.

It is an arithmetic number, because the mean of its divisors is an integer number (33710040).

Almost surely, 2^451998812 is an apocalyptic number.

It is an amenable number.

451998812 is a deficient number, since it is larger than the sum of its proper divisors (357042148).

451998812 is a wasteful number, since it uses less digits than its factorization.

451998812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3661 (or 3659 counting only the distinct ones).

The product of its digits is 207360, while the sum is 47.

The square root of 451998812 is about 21260.2636860411. The cubic root of 451998812 is about 767.4423555188.

The spelling of 451998812 in words is "four hundred fifty-one million, nine hundred ninety-eight thousand, eight hundred twelve".