30426720 has 48 divisors (see below), whose sum is σ = 95845680. Its totient is φ = 8113664.

The previous prime is 30426709. The next prime is 30426727. The reversal of 30426720 is 2762403.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30426727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31215 + ... + 32174.

It is an arithmetic number, because the mean of its divisors is an integer number (1996785).

Almost surely, 2^30426720 is an apocalyptic number.

30426720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

30426720 is an abundant number, since it is smaller than the sum of its proper divisors (65418960).

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

30426720 is a wasteful number, since it uses less digits than its factorization.

30426720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63407 (or 63399 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 30426720 is about 5516.0420593030. The cubic root of 30426720 is about 312.1895626471.

The spelling of 30426720 in words is "thirty million, four hundred twenty-six thousand, seven hundred twenty".