340021443 has 16 divisors (see below), whose sum is σ = 473564160. Its totient is φ = 216600384.

The previous prime is 340021441. The next prime is 340021457. The reversal of 340021443 is 344120043.

It is not a de Polignac number, because 340021443 - 2¹ = 340021441 is a prime.

It is a super-2 number, since 2×340021443² = 231229163399604498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (340021441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87030 + ... + 90852.

It is an arithmetic number, because the mean of its divisors is an integer number (29597760).

Almost surely, 2^340021443 is an apocalyptic number.

340021443 is a deficient number, since it is larger than the sum of its proper divisors (133542717).

340021443 is a wasteful number, since it uses less digits than its factorization.

340021443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5138.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 340021443 is about 18439.6703603942. The cubic root of 340021443 is about 697.9678771379.

Adding to 340021443 its reverse (344120043), we get a palindrome (684141486).

The spelling of 340021443 in words is "three hundred forty million, twenty-one thousand, four hundred forty-three".