42878475 has 36 divisors (see below), whose sum is σ = 77376000. Its totient is φ = 22697280.

The previous prime is 42878461. The next prime is 42878477. The reversal of 42878475 is 57487824.

It is not a de Polignac number, because 42878475 - 2¹³ = 42870283 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 42878475.

It is not an unprimeable number, because it can be changed into a prime (42878477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32886 + ... + 34164.

Almost surely, 2^42878475 is an apocalyptic number.

42878475 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42878475 is a deficient number, since it is larger than the sum of its proper divisors (34497525).

42878475 is a wasteful number, since it uses less digits than its factorization.

42878475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444 (or 1436 counting only the distinct ones).

The product of its digits is 501760, while the sum is 45.

The square root of 42878475 is about 6548.1657737110. The cubic root of 42878475 is about 350.0094555269.

Subtracting from 42878475 its sum of digits (45), we obtain a triangular number (42878430 = T₉₂₆₀).

The spelling of 42878475 in words is "forty-two million, eight hundred seventy-eight thousand, four hundred seventy-five".