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22490385 = 351499359
BaseRepresentation
bin101010111001…
…0110100010001
31120022122000020
41111302310101
521224143020
62122014053
7362110431
oct125626421
946278006
1022490385
11117713a5
127647329
134875b28
142db62c1
151e93c40
hex1572d11

22490385 has 8 divisors (see below), whose sum is σ = 35984640. Its totient is φ = 11994864.

The previous prime is 22490381. The next prime is 22490401. The reversal of 22490385 is 58309422.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22490385 - 22 = 22490381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22490381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 749665 + ... + 749694.

It is an arithmetic number, because the mean of its divisors is an integer number (4498080).

Almost surely, 222490385 is an apocalyptic number.

It is an amenable number.

22490385 is a deficient number, since it is larger than the sum of its proper divisors (13494255).

22490385 is a wasteful number, since it uses less digits than its factorization.

22490385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1499367.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 22490385 is about 4742.4028719627. The cubic root of 22490385 is about 282.2705893284.

It can be divided in two parts, 224 and 90385, that added together give a palindrome (90609).

The spelling of 22490385 in words is "twenty-two million, four hundred ninety thousand, three hundred eighty-five".

Divisors: 1 3 5 15 1499359 4498077 7496795 22490385