42977385 has 60 divisors (see below), whose sum is σ = 84777924. Its totient is φ = 20813760.

The previous prime is 42977383. The next prime is 42977393. The reversal of 42977385 is 58377924.

42977385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 26501904 + 16475481 = 5148^2 + 4059^2 .

It is not a de Polignac number, because 42977385 - 2¹ = 42977383 is a prime.

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 42977385.

It is not an unprimeable number, because it can be changed into a prime (42977383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 48567 + ... + 49443.

Almost surely, 2^42977385 is an apocalyptic number.

42977385 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42977385 is a deficient number, since it is larger than the sum of its proper divisors (41800539).

42977385 is a wasteful number, since it uses less digits than its factorization.

42977385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916 (or 896 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 42977385 is about 6555.7139199327. The cubic root of 42977385 is about 350.2783771698.

The spelling of 42977385 in words is "forty-two million, nine hundred seventy-seven thousand, three hundred eighty-five".