461660436 has 18 divisors (see below), whose sum is σ = 1166975082. Its totient is φ = 153886800.

The previous prime is 461660417. The next prime is 461660443. The reversal of 461660436 is 634066164.

461660436 is a `hidden beast` number, since 4 + 6 + 16 + 604 + 36 = 666.

It can be written as a sum of positive squares in only one way, i.e., 329640336 + 132020100 = 18156^2 + 11490^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 12823901 = 461660436 / (4 + 6 + 1 + 6 + 6 + 0 + 4 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 461660436.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 6411915 + ... + 6411986.

It is an arithmetic number, because the mean of its divisors is an integer number (64831949).

Almost surely, 2^461660436 is an apocalyptic number.

It is an amenable number.

461660436 is an abundant number, since it is smaller than the sum of its proper divisors (705314646).

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

461660436 is a wasteful number, since it uses less digits than its factorization.

461660436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12823911 (or 12823906 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 461660436 is about 21486.2848347498. The cubic root of 461660436 is about 772.8719621336.

The spelling of 461660436 in words is "four hundred sixty-one million, six hundred sixty thousand, four hundred thirty-six".