840628449 has 40 divisors (see below), whose sum is σ = 1314257472. Its totient is φ = 534457440.

The previous prime is 840628433. The next prime is 840628463. The reversal of 840628449 is 944826048.

840628449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 840628449 - 2⁴ = 840628433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840628409) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1216194 + ... + 1216884.

Almost surely, 2^840628449 is an apocalyptic number.

It is an amenable number.

840628449 is a deficient number, since it is larger than the sum of its proper divisors (473629023).

840628449 is a wasteful number, since it uses less digits than its factorization.

840628449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379 (or 1370 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 840628449 is about 28993.5932405764. The cubic root of 840628449 is about 943.7740413799.

The spelling of 840628449 in words is "eight hundred forty million, six hundred twenty-eight thousand, four hundred forty-nine".