28030426 has 4 divisors (see below), whose sum is σ = 42045642. Its totient is φ = 14015212.

The previous prime is 28030421. The next prime is 28030427. The reversal of 28030426 is 62403082.

It is a happy number.

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., 25999801 + 2030625 = 5099^2 + 1425^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28030426.

It is not an unprimeable number, because it can be changed into a prime (28030421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7007605 + ... + 7007608.

Almost surely, 2^28030426 is an apocalyptic number.

28030426 is a deficient number, since it is larger than the sum of its proper divisors (14015216).

28030426 is a wasteful number, since it uses less digits than its factorization.

28030426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14015215.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 28030426 is about 5294.3768282962. The cubic root of 28030426 is about 303.7688469623.

The spelling of 28030426 in words is "twenty-eight million, thirty thousand, four hundred twenty-six".