30720434 has 8 divisors (see below), whose sum is σ = 47326188. Its totient is φ = 14945040.

The previous prime is 30720421. The next prime is 30720457. The reversal of 30720434 is 43402703.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30085225 + 635209 = 5485^2 + 797^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 207497 + ... + 207644.

Almost surely, 2^30720434 is an apocalyptic number.

30720434 is a deficient number, since it is larger than the sum of its proper divisors (16605754).

30720434 is a wasteful number, since it uses less digits than its factorization.

30720434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415180.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 30720434 is about 5542.6017356473. The cubic root of 30720434 is about 313.1908861586.

The spelling of 30720434 in words is "thirty million, seven hundred twenty thousand, four hundred thirty-four".