905428447 has 32 divisors (see below), whose sum is σ = 1146562560. Its totient is φ = 694552320.

The previous prime is 905428441. The next prime is 905428457. The reversal of 905428447 is 744824509.

It is not a de Polignac number, because 905428447 - 2⁷ = 905428319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905428441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1955338 + ... + 1955800.

It is an arithmetic number, because the mean of its divisors is an integer number (35830080).

Almost surely, 2^905428447 is an apocalyptic number.

905428447 is a deficient number, since it is larger than the sum of its proper divisors (241134113).

905428447 is a wasteful number, since it uses less digits than its factorization.

905428447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 905428447 is about 30090.3381004601. The cubic root of 905428447 is about 967.4266459708.

It can be divided in two parts, 90542 and 8447, that added together give a palindrome (98989).

The spelling of 905428447 in words is "nine hundred five million, four hundred twenty-eight thousand, four hundred forty-seven".