42772158 has 128 divisors (see below), whose sum is σ = 116121600. Its totient is φ = 11491200.

The previous prime is 42772123. The next prime is 42772159. The reversal of 42772158 is 85127724.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42772159) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 223843 + ... + 224033.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 2^42772158 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42772158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58060800).

42772158 is an abundant number, since it is smaller than the sum of its proper divisors (73349442).

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

42772158 is a wasteful number, since it uses less digits than its factorization.

42772158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 249 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 42772158 is about 6540.0426604113. The cubic root of 42772158 is about 349.7199337769.

The spelling of 42772158 in words is "forty-two million, seven hundred seventy-two thousand, one hundred fifty-eight".