428019671 has 8 divisors (see below), whose sum is σ = 444352080.
Its totient is φ = 411792192.
The previous prime is 428019661. The next prime is 428019703. The reversal of 428019671 is 176910824.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 428019671 - 26 = 428019607 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (428019661) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17870 + ... + 34283.
It is an arithmetic number, because the mean of its divisors is an integer number (55544010).
Almost surely, 2428019671 is an apocalyptic number.
428019671 is a deficient number, since it is larger than the sum of its proper divisors (16332409).
428019671 is a wasteful number, since it uses less digits than its factorization.
428019671 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 52465.
The product of its (nonzero) digits is 24192, while the sum is 38.
The square root of 428019671 is about 20688.6362769517.
The cubic root of 428019671 is about 753.6237495718.
The spelling of 428019671 in words is "four hundred twenty-eight million, nineteen thousand, six hundred seventy-one".