428280820403 has 4 divisors (see below), whose sum is σ = 428414536008. Its totient is φ = 428147104800.

The previous prime is 428280820399. The next prime is 428280820411. The reversal of 428280820403 is 304028082824.

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 428280820403 - 2² = 428280820399 is a prime.

It is a super-2 number, since 2×428280820403² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428280820453) 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, 66852998 + ... + 66859403.

It is an arithmetic number, because the mean of its divisors is an integer number (107103634002).

Almost surely, 2^428280820403 is an apocalyptic number.

428280820403 is a deficient number, since it is larger than the sum of its proper divisors (133715605).

428280820403 is a wasteful number, since it uses less digits than its factorization.

428280820403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133715604.

The product of its (nonzero) digits is 196608, while the sum is 41.

The spelling of 428280820403 in words is "four hundred twenty-eight billion, two hundred eighty million, eight hundred twenty thousand, four hundred three".