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22042040 = 235643857
BaseRepresentation
bin101010000010…
…1010110111000
31112110211222212
41110011112320
521120321130
62104234252
7355232336
oct124052670
945424885
1022042040
1111495569
12746b988
134749a37
142cdab56
151e05e95
hex15055b8

22042040 has 32 divisors (see below), whose sum is σ = 49729680. Its totient is φ = 8792832.

The previous prime is 22042037. The next prime is 22042049. The reversal of 22042040 is 4024022.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22042049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25292 + ... + 26148.

Almost surely, 222042040 is an apocalyptic number.

22042040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22042040 is an abundant number, since it is smaller than the sum of its proper divisors (27687640).

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

22042040 is a wasteful number, since it uses less digits than its factorization.

22042040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1511 (or 1507 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 22042040 is about 4694.8950999996. The cubic root of 22042040 is about 280.3823009132.

Adding to 22042040 its reverse (4024022), we get a palindrome (26066062).

The spelling of 22042040 in words is "twenty-two million, forty-two thousand, forty".

Divisors: 1 2 4 5 8 10 20 40 643 857 1286 1714 2572 3215 3428 4285 5144 6430 6856 8570 12860 17140 25720 34280 551051 1102102 2204204 2755255 4408408 5510510 11021020 22042040