428161646 has 24 divisors (see below), whose sum is σ = 728720832. Its totient is φ = 188337600.

The previous prime is 428161639. The next prime is 428161663. The reversal of 428161646 is 646161824.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21035 + ... + 36038.

It is an arithmetic number, because the mean of its divisors is an integer number (30363368).

Almost surely, 2^428161646 is an apocalyptic number.

428161646 is a deficient number, since it is larger than the sum of its proper divisors (300559186).

428161646 is a wasteful number, since it uses less digits than its factorization.

428161646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57128 (or 57117 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 428161646 is about 20692.0672239387. The cubic root of 428161646 is about 753.7070665398.

The spelling of 428161646 in words is "four hundred twenty-eight million, one hundred sixty-one thousand, six hundred forty-six".