22420385 has 20 divisors (see below), whose sum is σ = 29332068. Its totient is φ = 16451136.

The previous prime is 22420379. The next prime is 22420403. The reversal of 22420385 is 58302422.

22420385 = T₄₅₄ + T₄₅₅ + ... + T₆₁₀.

It can be written as a sum of positive squares in 10 ways, for example, as 21752896 + 667489 = 4664^2 + 817^2 .

It is not a de Polignac number, because 22420385 - 2⁴ = 22420369 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 142727 + ... + 142883.

Almost surely, 2^22420385 is an apocalyptic number.

It is an amenable number.

22420385 is a deficient number, since it is larger than the sum of its proper divisors (6911683).

22420385 is an frugal number, since it uses more digits than its factorization.

22420385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 175 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 22420385 is about 4735.0168954292. The cubic root of 22420385 is about 281.9774347754.

The spelling of 22420385 in words is "twenty-two million, four hundred twenty thousand, three hundred eighty-five".