428194619397 has 12 divisors (see below), whose sum is σ = 618509010444. Its totient is φ = 285460462080.

The previous prime is 428194619383. The next prime is 428194619401. The reversal of 428194619397 is 793916491824.

428194619397 is a `hidden beast` number, since 4 + 2 + 8 + 1 + 9 + 4 + 619 + 3 + 9 + 7 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 214034844321 + 214159775076 = 462639^2 + 462774^2 .

It is not a de Polignac number, because 428194619397 - 2²⁶ = 428127510533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428194619317) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1839963 + ... + 2059575.

It is an arithmetic number, because the mean of its divisors is an integer number (51542417537).

Almost surely, 2^428194619397 is an apocalyptic number.

It is an amenable number.

428194619397 is a deficient number, since it is larger than the sum of its proper divisors (190314391047).

428194619397 is a wasteful number, since it uses less digits than its factorization.

428194619397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436260 (or 436257 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 428194619397 in words is "four hundred twenty-eight billion, one hundred ninety-four million, six hundred nineteen thousand, three hundred ninety-seven".