428119247 has 4 divisors (see below), whose sum is σ = 430270800. Its totient is φ = 425967696.

The previous prime is 428119189. The next prime is 428119259. The reversal of 428119247 is 742911824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428119247 - 2⁸ = 428118991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428119247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428119147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1075478 + ... + 1075875.

It is an arithmetic number, because the mean of its divisors is an integer number (107567700).

Almost surely, 2^428119247 is an apocalyptic number.

428119247 is a deficient number, since it is larger than the sum of its proper divisors (2151553).

428119247 is a wasteful number, since it uses less digits than its factorization.

428119247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151552.

The product of its digits is 32256, while the sum is 38.

The square root of 428119247 is about 20691.0426755154. The cubic root of 428119247 is about 753.6821869326.

The spelling of 428119247 in words is "four hundred twenty-eight million, one hundred nineteen thousand, two hundred forty-seven".