28780430 has 32 divisors (see below), whose sum is σ = 59438016. Its totient is φ = 9828864.

The previous prime is 28780417. The next prime is 28780463. The reversal of 28780430 is 3408782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21542 + ... + 22838.

It is an arithmetic number, because the mean of its divisors is an integer number (1857438).

Almost surely, 2^28780430 is an apocalyptic number.

28780430 is an abundant number, since it is smaller than the sum of its proper divisors (30657586).

28780430 is a wasteful number, since it uses less digits than its factorization.

28780430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 28780430 is about 5364.7395090535. The cubic root of 28780430 is about 306.4543281718.

The spelling of 28780430 in words is "twenty-eight million, seven hundred eighty thousand, four hundred thirty".