461898640 has 80 divisors (see below), whose sum is σ = 1231385472. Its totient is φ = 157842432.

The previous prime is 461898629. The next prime is 461898691. The reversal of 461898640 is 46898164.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193132 + ... + 195508.

Almost surely, 2^461898640 is an apocalyptic number.

461898640 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 461898640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (615692736).

461898640 is an abundant number, since it is smaller than the sum of its proper divisors (769486832).

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

461898640 is a wasteful number, since it uses less digits than its factorization.

461898640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2744 (or 2738 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 461898640 is about 21491.8272838770. The cubic root of 461898640 is about 773.0048661209.

The spelling of 461898640 in words is "four hundred sixty-one million, eight hundred ninety-eight thousand, six hundred forty".