428621386 has 8 divisors (see below), whose sum is σ = 643022820. Its totient is φ = 214280448.

The previous prime is 428621359. The next prime is 428621429. The reversal of 428621386 is 683126824.

It can be written as a sum of positive squares in 2 ways, for example, as 425143161 + 3478225 = 20619^2 + 1865^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13200 + ... + 32116.

Almost surely, 2^428621386 is an apocalyptic number.

428621386 is a deficient number, since it is larger than the sum of its proper divisors (214401434).

428621386 is a wasteful number, since it uses less digits than its factorization.

428621386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30248.

The product of its digits is 110592, while the sum is 40.

The square root of 428621386 is about 20703.1733316417. The cubic root of 428621386 is about 753.9767352052.

The spelling of 428621386 in words is "four hundred twenty-eight million, six hundred twenty-one thousand, three hundred eighty-six".