306461840 has 20 divisors (see below), whose sum is σ = 712523964. Its totient is φ = 122584704.

The previous prime is 306461833. The next prime is 306461843. The reversal of 306461840 is 48164603.

It can be written as a sum of positive squares in 2 ways, for example, as 105842944 + 200618896 = 10288^2 + 14164^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 306461797 and 306461806.

It is not an unprimeable number, because it can be changed into a prime (306461843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1915307 + ... + 1915466.

Almost surely, 2^306461840 is an apocalyptic number.

It is an amenable number.

306461840 is an abundant number, since it is smaller than the sum of its proper divisors (406062124).

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

306461840 is a wasteful number, since it uses less digits than its factorization.

306461840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3830786 (or 3830780 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 306461840 is about 17506.0515251155. The cubic root of 306461840 is about 674.2052575990.

The spelling of 306461840 in words is "three hundred six million, four hundred sixty-one thousand, eight hundred forty".