28051430 has 48 divisors (see below), whose sum is σ = 56306880. Its totient is φ = 10053120.

The previous prime is 28051409. The next prime is 28051489. The reversal of 28051430 is 3415082.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28051396 and 28051405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117251 + ... + 117489.

It is an arithmetic number, because the mean of its divisors is an integer number (1173060).

Almost surely, 2^28051430 is an apocalyptic number.

28051430 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

28051430 is a wasteful number, since it uses less digits than its factorization.

28051430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 354 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 28051430 is about 5296.3600708411. The cubic root of 28051430 is about 303.8447022474.

The spelling of 28051430 in words is "twenty-eight million, fifty-one thousand, four hundred thirty".