42772293 has 10 divisors (see below), whose sum is σ = 63894534. Its totient is φ = 28514808.

The previous prime is 42772273. The next prime is 42772309. The reversal of 42772293 is 39227724.

42772293 is a `hidden beast` number, since 427 + 7 + 229 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29354724 + 13417569 = 5418^2 + 3663^2 .

It is not a de Polignac number, because 42772293 - 2¹² = 42768197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42772273) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 263946 + ... + 264107.

Almost surely, 2^42772293 is an apocalyptic number.

It is an amenable number.

42772293 is a deficient number, since it is larger than the sum of its proper divisors (21122241).

42772293 is an equidigital number, since it uses as much as digits as its factorization.

42772293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528065 (or 528056 counting only the distinct ones).

The product of its digits is 42336, while the sum is 36.

The square root of 42772293 is about 6540.0529814368. The cubic root of 42772293 is about 349.7203017121.

The spelling of 42772293 in words is "forty-two million, seven hundred seventy-two thousand, two hundred ninety-three".