840520395 has 160 divisors (see below), whose sum is σ = 1850010624. Its totient is φ = 359251200.

The previous prime is 840520393. The next prime is 840520489. The reversal of 840520395 is 593025048.

840520395 is a `hidden beast` number, since 8 + 40 + 520 + 3 + 95 = 666.

It is not a de Polignac number, because 840520395 - 2¹ = 840520393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840520393) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 1331730 + ... + 1332360.

Almost surely, 2^840520395 is an apocalyptic number.

840520395 is an abundant number, since it is smaller than the sum of its proper divisors (1009490229).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

840520395 is a wasteful number, since it uses less digits than its factorization.

840520395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 840520395 is about 28991.7297690221. The cubic root of 840520395 is about 943.7336022179.

The spelling of 840520395 in words is "eight hundred forty million, five hundred twenty thousand, three hundred ninety-five".