840898401 has 16 divisors (see below), whose sum is σ = 1285938048. Its totient is φ = 478800000.

The previous prime is 840898381. The next prime is 840898403. The reversal of 840898401 is 104898048.

840898401 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 840898401 - 2¹⁰ = 840897377 is a prime.

It is a super-2 number, since 2×840898401² = 1414220241608713602, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (840898403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65350 + ... + 77151.

It is an arithmetic number, because the mean of its divisors is an integer number (80371128).

Almost surely, 2^840898401 is an apocalyptic number.

It is an amenable number.

840898401 is a deficient number, since it is larger than the sum of its proper divisors (445039647).

840898401 is a wasteful number, since it uses less digits than its factorization.

840898401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142792.

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 840898401 is about 28998.2482401955. The cubic root of 840898401 is about 943.8750556561.

The spelling of 840898401 in words is "eight hundred forty million, eight hundred ninety-eight thousand, four hundred one".