428863406 has 4 divisors (see below), whose sum is σ = 643295112. Its totient is φ = 214431702.

The previous prime is 428863399. The next prime is 428863417. The reversal of 428863406 is 604368824.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107215850 + ... + 107215853.

It is an arithmetic number, because the mean of its divisors is an integer number (160823778).

Almost surely, 2^428863406 is an apocalyptic number.

428863406 is a deficient number, since it is larger than the sum of its proper divisors (214431706).

428863406 is a wasteful number, since it uses less digits than its factorization.

428863406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214431705.

The product of its (nonzero) digits is 221184, while the sum is 41.

The square root of 428863406 is about 20709.0175044593. The cubic root of 428863406 is about 754.1186188668.

The spelling of 428863406 in words is "four hundred twenty-eight million, eight hundred sixty-three thousand, four hundred six".