428378012 has 24 divisors (see below), whose sum is σ = 764960112. Its totient is φ = 209830400.

The previous prime is 428377993. The next prime is 428378021. The reversal of 428378012 is 210873824.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204812 + ... + 206892.

It is an arithmetic number, because the mean of its divisors is an integer number (31873338).

Almost surely, 2^428378012 is an apocalyptic number.

It is an amenable number.

428378012 is a deficient number, since it is larger than the sum of its proper divisors (336582100).

428378012 is a wasteful number, since it uses less digits than its factorization.

428378012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109 (or 3107 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 428378012 is about 20697.2947990794. The cubic root of 428378012 is about 753.8340038954.

The spelling of 428378012 in words is "four hundred twenty-eight million, three hundred seventy-eight thousand, twelve".