42947550 has 96 divisors (see below), whose sum is σ = 122536800. Its totient is φ = 11047680.

The previous prime is 42947539. The next prime is 42947609. The reversal of 42947550 is 5574924.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38602 + ... + 39698.

It is an arithmetic number, because the mean of its divisors is an integer number (1276425).

Almost surely, 2^42947550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42947550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61268400).

42947550 is an abundant number, since it is smaller than the sum of its proper divisors (79589250).

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

42947550 is a wasteful number, since it uses less digits than its factorization.

42947550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1147 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 42947550 is about 6553.4380290043. The cubic root of 42947550 is about 350.1973037201.

The spelling of 42947550 in words is "forty-two million, nine hundred forty-seven thousand, five hundred fifty".