42884685 has 24 divisors (see below), whose sum is σ = 75740184. Its totient is φ = 22439040.

The previous prime is 42884683. The next prime is 42884713. The reversal of 42884685 is 58648824.

It can be written as a sum of positive squares in 4 ways, for example, as 21706281 + 21178404 = 4659^2 + 4602^2 .

It is not a de Polignac number, because 42884685 - 2¹ = 42884683 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 42884685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42884683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6606 + ... + 11375.

It is an arithmetic number, because the mean of its divisors is an integer number (3155841).

Almost surely, 2^42884685 is an apocalyptic number.

42884685 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42884685 is a deficient number, since it is larger than the sum of its proper divisors (32855499).

42884685 is a wasteful number, since it uses less digits than its factorization.

42884685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18045 (or 18042 counting only the distinct ones).

The product of its digits is 491520, while the sum is 45.

The square root of 42884685 is about 6548.6399351316. The cubic root of 42884685 is about 350.0263517574.

The spelling of 42884685 in words is "forty-two million, eight hundred eighty-four thousand, six hundred eighty-five".