28924330 has 16 divisors (see below), whose sum is σ = 52235784. Its totient is φ = 11531520.

The previous prime is 28924321. The next prime is 28924381. The reversal of 28924330 is 3342982.

It can be written as a sum of positive squares in 4 ways, for example, as 22857961 + 6066369 = 4781^2 + 2463^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28924292 and 28924301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1491 + ... + 7750.

Almost surely, 2^28924330 is an apocalyptic number.

28924330 is a deficient number, since it is larger than the sum of its proper divisors (23311454).

28924330 is a wasteful number, since it uses less digits than its factorization.

28924330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9561.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 28924330 is about 5378.1344349133. The cubic root of 28924330 is about 306.9642288744.

The spelling of 28924330 in words is "twenty-eight million, nine hundred twenty-four thousand, three hundred thirty".