451420240 has 40 divisors (see below), whose sum is σ = 1104795360. Its totient is φ = 171063936.

The previous prime is 451420231. The next prime is 451420271. The reversal of 451420240 is 42024154.

It is a happy number.

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

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, 146974 + ... + 150013.

It is an arithmetic number, because the mean of its divisors is an integer number (27619884).

Almost surely, 2^451420240 is an apocalyptic number.

451420240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451420240 is an abundant number, since it is smaller than the sum of its proper divisors (653375120).

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

451420240 is a wasteful number, since it uses less digits than its factorization.

451420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297019 (or 297013 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 451420240 is about 21246.6524422084. The cubic root of 451420240 is about 767.1147659804.

Adding to 451420240 its reverse (42024154), we get a palindrome (493444394).

The spelling of 451420240 in words is "four hundred fifty-one million, four hundred twenty thousand, two hundred forty".