428947886 has 4 divisors (see below), whose sum is σ = 643421832. Its totient is φ = 214473942.

The previous prime is 428947847. The next prime is 428947889. The reversal of 428947886 is 688749824.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428947889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107236970 + ... + 107236973.

It is an arithmetic number, because the mean of its divisors is an integer number (160855458).

Almost surely, 2^428947886 is an apocalyptic number.

428947886 is a deficient number, since it is larger than the sum of its proper divisors (214473946).

428947886 is a wasteful number, since it uses less digits than its factorization.

428947886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214473945.

The product of its digits is 6193152, while the sum is 56.

The square root of 428947886 is about 20711.0570951847. The cubic root of 428947886 is about 754.1681325016.

The spelling of 428947886 in words is "four hundred twenty-eight million, nine hundred forty-seven thousand, eight hundred eighty-six".