42528780 has 96 divisors (see below), whose sum is σ = 151226880. Its totient is φ = 9720000.

The previous prime is 42528751. The next prime is 42528833. The reversal of 42528780 is 8782524.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1846 + ... + 9405.

It is an arithmetic number, because the mean of its divisors is an integer number (1575280).

Almost surely, 2^42528780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42528780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75613440).

42528780 is an abundant number, since it is smaller than the sum of its proper divisors (108698100).

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

42528780 is a wasteful number, since it uses less digits than its factorization.

42528780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11276 (or 11268 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 42528780 is about 6521.4093568798. The cubic root of 42528780 is about 349.0553574857.

The spelling of 42528780 in words is "forty-two million, five hundred twenty-eight thousand, seven hundred eighty".