840490771 has 8 divisors (see below), whose sum is σ = 897431040. Its totient is φ = 785250312.

The previous prime is 840490759. The next prime is 840490823. The reversal of 840490771 is 177094048.

840490771 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 840490771 - 2¹³ = 840482579 is a prime.

It is a super-2 number, since 2×840490771² = 1412849472272348882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840490711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 423931 + ... + 425908.

It is an arithmetic number, because the mean of its divisors is an integer number (112178880).

Almost surely, 2^840490771 is an apocalyptic number.

840490771 is a deficient number, since it is larger than the sum of its proper divisors (56940269).

840490771 is a wasteful number, since it uses less digits than its factorization.

840490771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 849905.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 840490771 is about 28991.2188601997. The cubic root of 840490771 is about 943.7225148436.

The spelling of 840490771 in words is "eight hundred forty million, four hundred ninety thousand, seven hundred seventy-one".