340421128 has 16 divisors (see below), whose sum is σ = 639693180. Its totient is φ = 169836288.

The previous prime is 340421113. The next prime is 340421129. The reversal of 340421128 is 821124043.

It can be written as a sum of positive squares in 2 ways, for example, as 331312804 + 9108324 = 18202^2 + 3018^2 .

It is not an unprimeable number, because it can be changed into a prime (340421129) 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, 42901 + ... + 50212.

Almost surely, 2^340421128 is an apocalyptic number.

It is an amenable number.

340421128 is a deficient number, since it is larger than the sum of its proper divisors (299272052).

340421128 is a wasteful number, since it uses less digits than its factorization.

340421128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93576 (or 93572 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 340421128 is about 18450.5048169420. The cubic root of 340421128 is about 698.2412501483.

The spelling of 340421128 in words is "three hundred forty million, four hundred twenty-one thousand, one hundred twenty-eight".