28902930 has 32 divisors (see below), whose sum is σ = 79277184. Its totient is φ = 6606336.

The previous prime is 28902917. The next prime is 28902953. The reversal of 28902930 is 3920982.

It is a junction number, because it is equal to n+sod(n) for n = 28902891 and 28902900.

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, 68607 + ... + 69026.

It is an arithmetic number, because the mean of its divisors is an integer number (2477412).

Almost surely, 2^28902930 is an apocalyptic number.

28902930 is an abundant number, since it is smaller than the sum of its proper divisors (50374254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28902930 is a wasteful number, since it uses less digits than its factorization.

28902930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137650.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 28902930 is about 5376.1445293072. The cubic root of 28902930 is about 306.8885065186. Note that the first 3 decimals are identical.

The spelling of 28902930 in words is "twenty-eight million, nine hundred two thousand, nine hundred thirty".