28503430 has 8 divisors (see below), whose sum is σ = 51306192. Its totient is φ = 11401368.

The previous prime is 28503427. The next prime is 28503443. The reversal of 28503430 is 3430582.

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

It is a junction number, because it is equal to n+sod(n) for n = 28503395 and 28503404.

It is a congruent number.

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, 1425162 + ... + 1425181.

It is an arithmetic number, because the mean of its divisors is an integer number (6413274).

Almost surely, 2^28503430 is an apocalyptic number.

28503430 is a deficient number, since it is larger than the sum of its proper divisors (22802762).

28503430 is a wasteful number, since it uses less digits than its factorization.

28503430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850350.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 28503430 is about 5338.8603652840. The cubic root of 28503430 is about 305.4679906782.

The spelling of 28503430 in words is "twenty-eight million, five hundred three thousand, four hundred thirty".