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22045730 = 2572313693
BaseRepresentation
bin101010000011…
…0010000100010
31112111001001112
41110012100202
521120430410
62104303322
7355246160
oct124062042
945431045
1022045730
1111498313
127471b42
13474b615
142cdc230
151e07105
hex1506422

22045730 has 32 divisors (see below), whose sum is σ = 47326464. Its totient is φ = 7229376.

The previous prime is 22045729. The next prime is 22045733. The reversal of 22045730 is 3754022.

It is a super-2 number, since 2×220457302 = 972028422465800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22045696 and 22045705.

It is not an unprimeable number, because it can be changed into a prime (22045733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5237 + ... + 8456.

It is an arithmetic number, because the mean of its divisors is an integer number (1478952).

Almost surely, 222045730 is an apocalyptic number.

22045730 is an abundant number, since it is smaller than the sum of its proper divisors (25280734).

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

22045730 is a wasteful number, since it uses less digits than its factorization.

22045730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13730.

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 22045730 is about 4695.2880635803. The cubic root of 22045730 is about 280.3979460616.

Adding to 22045730 its reverse (3754022), we get a palindrome (25799752).

The spelling of 22045730 in words is "twenty-two million, forty-five thousand, seven hundred thirty".

Divisors: 1 2 5 7 10 14 23 35 46 70 115 161 230 322 805 1610 13693 27386 68465 95851 136930 191702 314939 479255 629878 958510 1574695 2204573 3149390 4409146 11022865 22045730