428469747 has 8 divisors (see below), whose sum is σ = 573855744. Its totient is φ = 284365128.

The previous prime is 428469739. The next prime is 428469761. The reversal of 428469747 is 747964824.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428469747 - 2³ = 428469739 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428469747.

It is not an unprimeable number, because it can be changed into a prime (428469647) 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, 319563 + ... + 320900.

It is an arithmetic number, because the mean of its divisors is an integer number (71731968).

Almost surely, 2^428469747 is an apocalyptic number.

428469747 is a deficient number, since it is larger than the sum of its proper divisors (145385997).

428469747 is a wasteful number, since it uses less digits than its factorization.

428469747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640689.

The product of its digits is 2709504, while the sum is 51.

The square root of 428469747 is about 20699.5107913206. The cubic root of 428469747 is about 753.8878099769.

The spelling of 428469747 in words is "four hundred twenty-eight million, four hundred sixty-nine thousand, seven hundred forty-seven".