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28405950 = 2352199967
BaseRepresentation
bin110110001011…
…1000010111110
31222110011122020
41230113002332
524232442300
62452501010
7463306116
oct154270276
958404566
1028405950
11150418a1
12961a766
135b67571
143ab6046
1527618a0
hex1b170be

28405950 has 48 divisors (see below), whose sum is σ = 74161920. Its totient is φ = 7175520.

The previous prime is 28405939. The next prime is 28406011. The reversal of 28405950 is 5950482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2134 + ... + 7833.

It is an arithmetic number, because the mean of its divisors is an integer number (1545040).

Almost surely, 228405950 is an apocalyptic number.

28405950 is an abundant number, since it is smaller than the sum of its proper divisors (45755970).

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

28405950 is a wasteful number, since it uses less digits than its factorization.

28405950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001 (or 9996 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28405950 is about 5329.7232573559. The cubic root of 28405950 is about 305.1193656230.

The spelling of 28405950 in words is "twenty-eight million, four hundred five thousand, nine hundred fifty".

Divisors: 1 2 3 5 6 10 15 19 25 30 38 50 57 75 95 114 150 190 285 475 570 950 1425 2850 9967 19934 29901 49835 59802 99670 149505 189373 249175 299010 378746 498350 568119 747525 946865 1136238 1495050 1893730 2840595 4734325 5681190 9468650 14202975 28405950