42722788 has 6 divisors (see below), whose sum is σ = 74764886. Its totient is φ = 21361392.

The previous prime is 42722783. The next prime is 42722807. The reversal of 42722788 is 88722724.

It can be written as a sum of positive squares in only one way, i.e., 34668544 + 8054244 = 5888^2 + 2838^2 .

It is a super-2 number, since 2×42722788² = 3650473228985888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42722788.

It is not an unprimeable number, because it can be changed into a prime (42722783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5340345 + ... + 5340352.

Almost surely, 2^42722788 is an apocalyptic number.

It is an amenable number.

42722788 is a deficient number, since it is larger than the sum of its proper divisors (32042098).

42722788 is a wasteful number, since it uses less digits than its factorization.

42722788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10680701 (or 10680699 counting only the distinct ones).

The product of its digits is 100352, while the sum is 40.

The square root of 42722788 is about 6536.2671304040. The cubic root of 42722788 is about 349.5853265838.

The spelling of 42722788 in words is "forty-two million, seven hundred twenty-two thousand, seven hundred eighty-eight".