42947538 has 32 divisors (see below), whose sum is σ = 87827712. Its totient is φ = 13996800.

The previous prime is 42947537. The next prime is 42947539. The reversal of 42947538 is 83574924.

It is an interprime number because it is at equal distance from previous prime (42947537) and next prime (42947539).

It is a super-2 number, since 2×42947538² = 3688982040522888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42947538.

It is not an unprimeable number, because it can be changed into a prime (42947537) 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, 98970 + ... + 99402.

It is an arithmetic number, because the mean of its divisors is an integer number (2744616).

Almost surely, 2^42947538 is an apocalyptic number.

42947538 is an abundant number, since it is smaller than the sum of its proper divisors (44880174).

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

42947538 is a wasteful number, since it uses less digits than its factorization.

42947538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770.

The product of its digits is 241920, while the sum is 42.

The square root of 42947538 is about 6553.4371134543. The cubic root of 42947538 is about 350.1972711038.

The spelling of 42947538 in words is "forty-two million, nine hundred forty-seven thousand, five hundred thirty-eight".