189835428386 has 8 divisors (see below), whose sum is σ = 284765262444. Its totient is φ = 94913674240.

The previous prime is 189835428373. The next prime is 189835428413. The reversal of 189835428386 is 683824538981.

It can be written as a sum of positive squares in 2 ways, for example, as 182099346361 + 7736082025 = 426731^2 + 87955^2 .

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

It is a super-2 number, since 2×189835428386² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1960895 + ... + 2055426.

Almost surely, 2^189835428386 is an apocalyptic number.

189835428386 is a deficient number, since it is larger than the sum of its proper divisors (94929834058).

189835428386 is a wasteful number, since it uses less digits than its factorization.

189835428386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4039956.

The product of its digits is 79626240, while the sum is 65.

The spelling of 189835428386 in words is "one hundred eighty-nine billion, eight hundred thirty-five million, four hundred twenty-eight thousand, three hundred eighty-six".