28930434 has 48 divisors (see below), whose sum is σ = 63490752. Its totient is φ = 8783424.

The previous prime is 28930361. The next prime is 28930457. The reversal of 28930434 is 43403982.

It is a super-2 number, since 2×28930434² = 1673940022856712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28930395 and 28930404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104304 + ... + 104580.

It is an arithmetic number, because the mean of its divisors is an integer number (1322724).

Almost surely, 2^28930434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28930434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31745376).

28930434 is an abundant number, since it is smaller than the sum of its proper divisors (34560318).

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

28930434 is a wasteful number, since it uses less digits than its factorization.

28930434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 28930434 is about 5378.7018880023. The cubic root of 28930434 is about 306.9858205917.

The spelling of 28930434 in words is "twenty-eight million, nine hundred thirty thousand, four hundred thirty-four".