451545440 has 24 divisors (see below), whose sum is σ = 1066776480. Its totient is φ = 180618112.

The previous prime is 451545439. The next prime is 451545443. The reversal of 451545440 is 44545154.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 451545397 and 451545406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (451545443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1410920 + ... + 1411239.

It is an arithmetic number, because the mean of its divisors is an integer number (44449020).

Almost surely, 2^451545440 is an apocalyptic number.

451545440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451545440 is an abundant number, since it is smaller than the sum of its proper divisors (615231040).

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

451545440 is a wasteful number, since it uses less digits than its factorization.

451545440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2822174 (or 2822166 counting only the distinct ones).

The product of its (nonzero) digits is 32000, while the sum is 32.

The square root of 451545440 is about 21249.5985844439. The cubic root of 451545440 is about 767.1856783901.

The spelling of 451545440 in words is "four hundred fifty-one million, five hundred forty-five thousand, four hundred forty".