451235240 has 16 divisors (see below), whose sum is σ = 1015279380. Its totient is φ = 180494080.

The previous prime is 451235231. The next prime is 451235261. The reversal of 451235240 is 42532154.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 382046116 + 69189124 = 19546^2 + 8318^2 .

It is a super-2 number, since 2×451235240² = 407226483635715200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5640401 + ... + 5640480.

Almost surely, 2^451235240 is an apocalyptic number.

451235240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451235240 is an abundant number, since it is smaller than the sum of its proper divisors (564044140).

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

451235240 is a wasteful number, since it uses less digits than its factorization.

451235240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11280892 (or 11280888 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 451235240 is about 21242.2983690560. The cubic root of 451235240 is about 767.0099592614.

Adding to 451235240 its reverse (42532154), we get a palindrome (493767394).

The spelling of 451235240 in words is "four hundred fifty-one million, two hundred thirty-five thousand, two hundred forty".