42884409 has 4 divisors (see below), whose sum is σ = 57179216. Its totient is φ = 28589604.

The previous prime is 42884399. The next prime is 42884441. The reversal of 42884409 is 90448824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42884409 - 2¹⁶ = 42818873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42884509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7147399 + ... + 7147404.

It is an arithmetic number, because the mean of its divisors is an integer number (14294804).

Almost surely, 2^42884409 is an apocalyptic number.

It is an amenable number.

42884409 is a deficient number, since it is larger than the sum of its proper divisors (14294807).

42884409 is a wasteful number, since it uses less digits than its factorization.

42884409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14294806.

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 42884409 is about 6548.6188620197. The cubic root of 42884409 is about 350.0256008485.

The spelling of 42884409 in words is "forty-two million, eight hundred eighty-four thousand, four hundred nine".