461811840 has 128 divisors (see below), whose sum is σ = 1682363520. Its totient is φ = 105553920.

The previous prime is 461811829. The next prime is 461811841. The reversal of 461811840 is 48118164.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (461811841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3741 + ... + 30620.

It is an arithmetic number, because the mean of its divisors is an integer number (13143465).

Almost surely, 2^461811840 is an apocalyptic number.

461811840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 461811840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (841181760).

461811840 is an abundant number, since it is smaller than the sum of its proper divisors (1220551680).

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

461811840 is a wasteful number, since it uses less digits than its factorization.

461811840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34390 (or 34378 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 33.

The square root of 461811840 is about 21489.8078167302. The cubic root of 461811840 is about 772.9564420585.

The spelling of 461811840 in words is "four hundred sixty-one million, eight hundred eleven thousand, eight hundred forty".