42775623 has 24 divisors (see below), whose sum is σ = 67616640. Its totient is φ = 25842960.

The previous prime is 42775619. The next prime is 42775643. The reversal of 42775623 is 32657724.

It is a happy number.

42775623 is a `hidden beast` number, since 4 + 27 + 7 + 5 + 623 = 666.

It is not a de Polignac number, because 42775623 - 2² = 42775619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42775613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49368 + ... + 50226.

It is an arithmetic number, because the mean of its divisors is an integer number (2817360).

Almost surely, 2^42775623 is an apocalyptic number.

42775623 is a deficient number, since it is larger than the sum of its proper divisors (24841017).

42775623 is a wasteful number, since it uses less digits than its factorization.

42775623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379 (or 1376 counting only the distinct ones).

The product of its digits is 70560, while the sum is 36.

The square root of 42775623 is about 6540.3075615754. The cubic root of 42775623 is about 349.7293772008.

The spelling of 42775623 in words is "forty-two million, seven hundred seventy-five thousand, six hundred twenty-three".