428779860 has 48 divisors (see below), whose sum is σ = 1209370176. Its totient is φ = 113504512.

The previous prime is 428779843. The next prime is 428779861. The reversal of 428779860 is 68977824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428779861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17862 + ... + 34301.

It is an arithmetic number, because the mean of its divisors is an integer number (25195212).

Almost surely, 2^428779860 is an apocalyptic number.

It is an amenable number.

428779860 is an abundant number, since it is smaller than the sum of its proper divisors (780590316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428779860 is a wasteful number, since it uses less digits than its factorization.

428779860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52312 (or 52310 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The square root of 428779860 is about 20707.0002656107. Note that the first 3 decimals coincide. The cubic root of 428779860 is about 754.0696462531.

The spelling of 428779860 in words is "four hundred twenty-eight million, seven hundred seventy-nine thousand, eight hundred sixty".