28649430 has 32 divisors (see below), whose sum is σ = 76399200. Its totient is φ = 7639776.

The previous prime is 28649407. The next prime is 28649459. The reversal of 28649430 is 3494682.

It is a happy number.

28649430 is a `hidden beast` number, since 2 + 8 + 649 + 4 + 3 + 0 = 666.

It is a Curzon number.

It is a congruent number.

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, 52785 + ... + 53324.

It is an arithmetic number, because the mean of its divisors is an integer number (2387475).

Almost surely, 2^28649430 is an apocalyptic number.

28649430 is an abundant number, since it is smaller than the sum of its proper divisors (47749770).

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

28649430 is a wasteful number, since it uses less digits than its factorization.

28649430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106125 (or 106119 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 28649430 is about 5352.5162307087. The cubic root of 28649430 is about 305.9886577880.

The spelling of 28649430 in words is "twenty-eight million, six hundred forty-nine thousand, four hundred thirty".