42204778 has 80 divisors (see below), whose sum is σ = 87122304. Its totient is φ = 15146880.

The previous prime is 42204749. The next prime is 42204781. The reversal of 42204778 is 87740224.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 897951 + ... + 897997.

Almost surely, 2^42204778 is an apocalyptic number.

42204778 is an abundant number, since it is smaller than the sum of its proper divisors (44917526).

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

42204778 is a wasteful number, since it uses less digits than its factorization.

42204778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 34.

The square root of 42204778 is about 6496.5204532888. The cubic root of 42204778 is about 348.1666804030.

It can be divided in two parts, 4220 and 4778, that added together give a palindrome (8998).

The spelling of 42204778 in words is "forty-two million, two hundred four thousand, seven hundred seventy-eight".