340128983 has 4 divisors (see below), whose sum is σ = 343139088. Its totient is φ = 337118880.

The previous prime is 340128977. The next prime is 340129019. The reversal of 340128983 is 389821043.

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 340128983 - 2²⁴ = 323351767 is a prime.

It is a super-2 number, since 2×340128983² = 231375450153228578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340128883) 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, 1504883 + ... + 1505108.

It is an arithmetic number, because the mean of its divisors is an integer number (85784772).

Almost surely, 2^340128983 is an apocalyptic number.

340128983 is a deficient number, since it is larger than the sum of its proper divisors (3010105).

340128983 is a wasteful number, since it uses less digits than its factorization.

340128983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3010104.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 340128983 is about 18442.5861255953. The cubic root of 340128983 is about 698.0414524524.

The spelling of 340128983 in words is "three hundred forty million, one hundred twenty-eight thousand, nine hundred eighty-three".