840674457 has 20 divisors (see below), whose sum is σ = 1435226496. Its totient is φ = 480385080.

The previous prime is 840674453. The next prime is 840674473. The reversal of 840674457 is 754476048.

840674457 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 840674457 - 2² = 840674453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840674453) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 740769 + ... + 741902.

Almost surely, 2^840674457 is an apocalyptic number.

It is an amenable number.

840674457 is a deficient number, since it is larger than the sum of its proper divisors (594552039).

840674457 is a wasteful number, since it uses less digits than its factorization.

840674457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1482690 (or 1482681 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The square root of 840674457 is about 28994.3866463838. The cubic root of 840674457 is about 943.7912588018.

The spelling of 840674457 in words is "eight hundred forty million, six hundred seventy-four thousand, four hundred fifty-seven".