451992240 has 120 divisors (see below), whose sum is σ = 1734808608. Its totient is φ = 103311360.

The previous prime is 451992227. The next prime is 451992263. The reversal of 451992240 is 42299154.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 451992195 and 451992204.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39801 + ... + 49880.

Almost surely, 2^451992240 is an apocalyptic number.

451992240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

451992240 is an abundant number, since it is smaller than the sum of its proper divisors (1282816368).

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

451992240 is a wasteful number, since it uses less digits than its factorization.

451992240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89707 (or 89698 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 451992240 is about 21260.1091248375. The cubic root of 451992240 is about 767.4386359990.

The spelling of 451992240 in words is "four hundred fifty-one million, nine hundred ninety-two thousand, two hundred forty".