28939950 has 192 divisors, whose sum is σ = 91869120. Its totient is φ = 6635520.

The previous prime is 28939949. The next prime is 28939997. The reversal of 28939950 is 5993982.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28939896 and 28939905.

It is a congruent number.

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, 298302 + ... + 298398.

It is an arithmetic number, because the mean of its divisors is an integer number (478485).

Almost surely, 2^28939950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28939950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45934560).

28939950 is an abundant number, since it is smaller than the sum of its proper divisors (62929170).

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

28939950 is a wasteful number, since it uses less digits than its factorization.

28939950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 28939950 is about 5379.5864153297. The cubic root of 28939950 is about 307.0194755405.

The spelling of 28939950 in words is "twenty-eight million, nine hundred thirty-nine thousand, nine hundred fifty".