42292778 has 16 divisors (see below), whose sum is σ = 69755904. Its totient is φ = 19071360.

The previous prime is 42292777. The next prime is 42292799. The reversal of 42292778 is 87729224.

It is not an unprimeable number, because it can be changed into a prime (42292777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4775 + ... + 10362.

It is an arithmetic number, because the mean of its divisors is an integer number (4359744).

Almost surely, 2^42292778 is an apocalyptic number.

42292778 is a deficient number, since it is larger than the sum of its proper divisors (27463126).

42292778 is a wasteful number, since it uses less digits than its factorization.

42292778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15277.

The product of its digits is 112896, while the sum is 41.

The square root of 42292778 is about 6503.2897828714. The cubic root of 42292778 is about 348.4084966092.

It can be divided in two parts, 4229 and 2778, that added together give a palindrome (7007).

The spelling of 42292778 in words is "forty-two million, two hundred ninety-two thousand, seven hundred seventy-eight".