42552978 has 16 divisors (see below), whose sum is σ = 91652736. Its totient is φ = 13093200.

The previous prime is 42552977. The next prime is 42553019. The reversal of 42552978 is 87925524.

It is not an unprimeable number, because it can be changed into a prime (42552971) 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, 272698 + ... + 272853.

It is an arithmetic number, because the mean of its divisors is an integer number (5728296).

Almost surely, 2^42552978 is an apocalyptic number.

42552978 is an abundant number, since it is smaller than the sum of its proper divisors (49099758).

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

42552978 is a wasteful number, since it uses less digits than its factorization.

42552978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545569.

The product of its digits is 201600, while the sum is 42.

The square root of 42552978 is about 6523.2643668642. The cubic root of 42552978 is about 349.1215467039.

The spelling of 42552978 in words is "forty-two million, five hundred fifty-two thousand, nine hundred seventy-eight".