451144240 has 40 divisors (see below), whose sum is σ = 1082752128. Its totient is φ = 174635520.

The previous prime is 451144231. The next prime is 451144297. The reversal of 451144240 is 42441154.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×451144240² = 407062250570355200, which contains 22 as substring.

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, 88477 + ... + 93436.

Almost surely, 2^451144240 is an apocalyptic number.

451144240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451144240 is an abundant number, since it is smaller than the sum of its proper divisors (631607888).

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

451144240 is a wasteful number, since it uses less digits than its factorization.

451144240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181957 (or 181951 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 451144240 is about 21240.1563082761. The cubic root of 451144240 is about 766.9583951749.

Adding to 451144240 its reverse (42441154), we get a palindrome (493585394).

The spelling of 451144240 in words is "four hundred fifty-one million, one hundred forty-four thousand, two hundred forty".