28948950 has 72 divisors (see below), whose sum is σ = 81186768. Its totient is φ = 7381440.

The previous prime is 28948939. The next prime is 28948979. The reversal of 28948950 is 5984982.

It is a super-2 number, since 2×28948950² = 1676083412205000, which contains 22 as substring.

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 = 28948896 and 28948905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8952 + ... + 11748.

It is an arithmetic number, because the mean of its divisors is an integer number (1127594).

Almost surely, 2^28948950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28948950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40593384).

28948950 is an abundant number, since it is smaller than the sum of its proper divisors (52237818).

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

28948950 is a wasteful number, since it uses less digits than its factorization.

28948950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2838 (or 2830 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 28948950 is about 5380.4228458366. The cubic root of 28948950 is about 307.0512987802.

The spelling of 28948950 in words is "twenty-eight million, nine hundred forty-eight thousand, nine hundred fifty".