42779388 has 24 divisors (see below), whose sum is σ = 100420992. Its totient is φ = 14173744.

The previous prime is 42779383. The next prime is 42779413. The reversal of 42779388 is 88397724.

42779388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42779381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8670 + ... + 12677.

It is an arithmetic number, because the mean of its divisors is an integer number (4184208).

Almost surely, 2^42779388 is an apocalyptic number.

It is an amenable number.

42779388 is an abundant number, since it is smaller than the sum of its proper divisors (57641604).

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

42779388 is a wasteful number, since it uses less digits than its factorization.

42779388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21521 (or 21519 counting only the distinct ones).

The product of its digits is 677376, while the sum is 48.

The square root of 42779388 is about 6540.5953857428. The cubic root of 42779388 is about 349.7396376590.

The spelling of 42779388 in words is "forty-two million, seven hundred seventy-nine thousand, three hundred eighty-eight".