428987836 has 24 divisors (see below), whose sum is σ = 777435120. Its totient is φ = 206879232.

The previous prime is 428987813. The next prime is 428987849. The reversal of 428987836 is 638789824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187596 + ... + 189868.

It is an arithmetic number, because the mean of its divisors is an integer number (32393130).

Almost surely, 2^428987836 is an apocalyptic number.

It is an amenable number.

428987836 is a deficient number, since it is larger than the sum of its proper divisors (348447284).

428987836 is a wasteful number, since it uses less digits than its factorization.

428987836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3933 (or 3931 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 55.

The square root of 428987836 is about 20712.0215333994. The cubic root of 428987836 is about 754.1915448885.

The spelling of 428987836 in words is "four hundred twenty-eight million, nine hundred eighty-seven thousand, eight hundred thirty-six".