306431424 has 140 divisors (see below), whose sum is σ = 978447624. Its totient is φ = 94265856.

The previous prime is 306431387. The next prime is 306431431. The reversal of 306431424 is 424134603.

306431424 is a `hidden beast` number, since 3 + 0 + 643 + 14 + 2 + 4 = 666.

It is a super-2 number, since 2×306431424² = 187800435229335552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 19 ways as a sum of consecutive naturals, for example, 65119 + ... + 69665.

Almost surely, 2^306431424 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 306431424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489223812).

306431424 is an abundant number, since it is smaller than the sum of its proper divisors (672016200).

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

306431424 is a wasteful number, since it uses less digits than its factorization.

306431424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4584 (or 4565 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 306431424 is about 17505.1827753954. The cubic root of 306431424 is about 674.1829521514.

The spelling of 306431424 in words is "three hundred six million, four hundred thirty-one thousand, four hundred twenty-four".