28649250 has 192 divisors, whose sum is σ = 94618368. Its totient is φ = 6105600.

The previous prime is 28649227. The next prime is 28649263. The reversal of 28649250 is 5294682.

It is a happy number.

28649250 is a `hidden beast` number, since 2 + 8 + 649 + 2 + 5 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 267697 + ... + 267803.

It is an arithmetic number, because the mean of its divisors is an integer number (492804).

Almost surely, 2^28649250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28649250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47309184).

28649250 is an abundant number, since it is smaller than the sum of its proper divisors (65969118).

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

28649250 is a wasteful number, since it uses less digits than its factorization.

28649250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 28649250 is about 5352.4994161606. The cubic root of 28649250 is about 305.9880169599.

The spelling of 28649250 in words is "twenty-eight million, six hundred forty-nine thousand, two hundred fifty".