30172426 has 4 divisors (see below), whose sum is σ = 45258642. Its totient is φ = 15086212.

The previous prime is 30172421. The next prime is 30172447. The reversal of 30172426 is 62427103.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18619225 + 11553201 = 4315^2 + 3399^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30172426.

It is not an unprimeable number, because it can be changed into a prime (30172421) by changing a digit.

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 as a sum of consecutive naturals, namely, 7543105 + ... + 7543108.

Almost surely, 2^30172426 is an apocalyptic number.

30172426 is a deficient number, since it is larger than the sum of its proper divisors (15086216).

30172426 is a wasteful number, since it uses less digits than its factorization.

30172426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15086215.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 30172426 is about 5492.9432911691. The cubic root of 30172426 is about 311.3174111394.

Adding to 30172426 its reverse (62427103), we get a palindrome (92599529).

It can be divided in two parts, 301 and 72426, that added together give a palindrome (72727).

The spelling of 30172426 in words is "thirty million, one hundred seventy-two thousand, four hundred twenty-six".