30427840 has 28 divisors (see below), whose sum is σ = 72457056. Its totient is φ = 12171008.

The previous prime is 30427829. The next prime is 30427853. The reversal of 30427840 is 4872403.

It is a junction number, because it is equal to n+sod(n) for n = 30427799 and 30427808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47224 + ... + 47863.

It is an arithmetic number, because the mean of its divisors is an integer number (2587752).

Almost surely, 2^30427840 is an apocalyptic number.

It is an amenable number.

30427840 is an abundant number, since it is smaller than the sum of its proper divisors (42029216).

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

30427840 is an equidigital number, since it uses as much as digits as its factorization.

30427840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95104 (or 95094 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 30427840 is about 5516.1435804373. The cubic root of 30427840 is about 312.1933931402.

The spelling of 30427840 in words is "thirty million, four hundred twenty-seven thousand, eight hundred forty".