42777724 has 12 divisors (see below), whose sum is σ = 81666648. Its totient is φ = 19444400.

The previous prime is 42777703. The next prime is 42777727.

It is a happy number.

42777724 is nontrivially palindromic in base 10.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42777727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486067 + ... + 486154.

It is an arithmetic number, because the mean of its divisors is an integer number (6805554).

Almost surely, 2^42777724 is an apocalyptic number.

42777724 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

42777724 is a deficient number, since it is larger than the sum of its proper divisors (38888924).

42777724 is a wasteful number, since it uses less digits than its factorization.

42777724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972236 (or 972234 counting only the distinct ones).

The product of its digits is 153664, while the sum is 40.

The square root of 42777724 is about 6540.4681789609. The cubic root of 42777724 is about 349.7351029650.

The spelling of 42777724 in words is "forty-two million, seven hundred seventy-seven thousand, seven hundred twenty-four".