42555380 has 48 divisors (see below), whose sum is σ = 104522880. Its totient is φ = 14249088.

The previous prime is 42555379. The next prime is 42555389. The reversal of 42555380 is 8355524.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42555389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2486 + ... + 9554.

It is an arithmetic number, because the mean of its divisors is an integer number (2177560).

Almost surely, 2^42555380 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 42555380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52261440).

42555380 is an abundant number, since it is smaller than the sum of its proper divisors (61967500).

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

42555380 is a wasteful number, since it uses less digits than its factorization.

42555380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7128 (or 7126 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The square root of 42555380 is about 6523.4484745417. The cubic root of 42555380 is about 349.1281155679.

The spelling of 42555380 in words is "forty-two million, five hundred fifty-five thousand, three hundred eighty".