22072393 has 20 divisors (see below), whose sum is σ = 26721540. Its totient is φ = 18209184.

The previous prime is 22072343. The next prime is 22072399. The reversal of 22072393 is 39327022.

It can be written as a sum of positive squares in 2 ways, for example, as 5531904 + 16540489 = 2352^2 + 4067^2 .

It is not a de Polignac number, because 22072393 - 2¹³ = 22064201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22072399) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 69471 + ... + 69787.

It is an arithmetic number, because the mean of its divisors is an integer number (1336077).

Almost surely, 2^22072393 is an apocalyptic number.

It is an amenable number.

22072393 is a deficient number, since it is larger than the sum of its proper divisors (4649147).

22072393 is an frugal number, since it uses more digits than its factorization.

22072393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 22072393 is about 4698.1265415057. The cubic root of 22072393 is about 280.5109420693.

The spelling of 22072393 in words is "twenty-two million, seventy-two thousand, three hundred ninety-three".