451187940 has 96 divisors (see below), whose sum is σ = 1471115520. Its totient is φ = 101177856.

The previous prime is 451187923. The next prime is 451187959. The reversal of 451187940 is 49781154.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12126 + ... + 32394.

It is an arithmetic number, because the mean of its divisors is an integer number (15324120).

Almost surely, 2^451187940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 451187940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (735557760).

451187940 is an abundant number, since it is smaller than the sum of its proper divisors (1019927580).

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

451187940 is a wasteful number, since it uses less digits than its factorization.

451187940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20341 (or 20339 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 451187940 is about 21241.1849951927. The cubic root of 451187940 is about 766.9831581345.

The spelling of 451187940 in words is "four hundred fifty-one million, one hundred eighty-seven thousand, nine hundred forty".