451000000 has 196 divisors, whose sum is σ = 1250140248. Its totient is φ = 160000000.

The previous prime is 450999977. The next prime is 451000009. The reversal of 451000000 is 154.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (451000009) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 10999980 + ... + 11000020.

Almost surely, 2^451000000 is an apocalyptic number.

451000000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (625070124).

451000000 is an abundant number, since it is smaller than the sum of its proper divisors (799140248).

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

451000000 is an frugal number, since it uses more digits than its factorization.

451000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94 (or 59 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 451000000 is about 21236.7605815953. The cubic root of 451000000 is about 766.8766490569.

Adding to 451000000 its reverse (154), we get a palindrome (451000154).

The spelling of 451000000 in words is "four hundred fifty-one million", and thus it is an aban number.