28934490 has 64 divisors (see below), whose sum is σ = 75398400. Its totient is φ = 7106112.

The previous prime is 28934453. The next prime is 28934491. The reversal of 28934490 is 9443982.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28934491) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65691 + ... + 66129.

It is an arithmetic number, because the mean of its divisors is an integer number (1178100).

Almost surely, 2^28934490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28934490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37699200).

28934490 is an abundant number, since it is smaller than the sum of its proper divisors (46463910).

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

28934490 is a wasteful number, since it uses less digits than its factorization.

28934490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488 (or 462 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 28934490 is about 5379.0789174356. The cubic root of 28934490 is about 307.0001662263. Note that the first 3 decimals are identical.

The spelling of 28934490 in words is "twenty-eight million, nine hundred thirty-four thousand, four hundred ninety".