1451491800 has 144 divisors (see below), whose sum is σ = 4946115720. Its totient is φ = 351859200.

The previous prime is 1451491781. The next prime is 1451491813. The reversal of 1451491800 is 81941541.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 62604 + ... + 82596.

Almost surely, 2^1451491800 is an apocalyptic number.

1451491800 is a gapful number since it is divisible by the number (10) 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 1451491800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2473057860).

1451491800 is an abundant number, since it is smaller than the sum of its proper divisors (3494623920).

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

1451491800 is a wasteful number, since it uses less digits than its factorization.

1451491800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20034 (or 20014 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 1451491800 is about 38098.4487873194. The cubic root of 1451491800 is about 1132.2392228337.

The spelling of 1451491800 in words is "one billion, four hundred fifty-one million, four hundred ninety-one thousand, eight hundred".