28979950 has 24 divisors (see below), whose sum is σ = 54159480. Its totient is φ = 11536800.

The previous prime is 28979897. The next prime is 28979957. The reversal of 28979950 is 5997982.

It is a junction number, because it is equal to n+sod(n) for n = 28979894 and 28979903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28979957) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10185 + ... + 12715.

It is an arithmetic number, because the mean of its divisors is an integer number (2256645).

Almost surely, 2^28979950 is an apocalyptic number.

28979950 is a deficient number, since it is larger than the sum of its proper divisors (25179530).

28979950 is a wasteful number, since it uses less digits than its factorization.

28979950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2772 (or 2767 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 49.

The square root of 28979950 is about 5383.3028894908. The cubic root of 28979950 is about 307.1608617018.

It can be divided in two parts, 28979 and 950, that added together give a square (29929 = 173²).

The spelling of 28979950 in words is "twenty-eight million, nine hundred seventy-nine thousand, nine hundred fifty".