428860641 has 16 divisors (see below), whose sum is σ = 624461760. Its totient is φ = 259638720.

The previous prime is 428860589. The next prime is 428860643. The reversal of 428860641 is 146068824.

It is not a de Polignac number, because 428860641 - 2⁹ = 428860129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428860641.

It is not an unprimeable number, because it can be changed into a prime (428860643) 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, 27015 + ... + 39843.

It is an arithmetic number, because the mean of its divisors is an integer number (39028860).

Almost surely, 2^428860641 is an apocalyptic number.

It is an amenable number.

428860641 is a deficient number, since it is larger than the sum of its proper divisors (195601119).

428860641 is a wasteful number, since it uses less digits than its factorization.

428860641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13856.

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 428860641 is about 20708.9507459939. The cubic root of 428860641 is about 754.1169981934.

The spelling of 428860641 in words is "four hundred twenty-eight million, eight hundred sixty thousand, six hundred forty-one".