840193401 has 8 divisors (see below), whose sum is σ = 1120392000. Its totient is φ = 560061872.

The previous prime is 840193399. The next prime is 840193421. The reversal of 840193401 is 104391048.

It is a happy number.

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 840193401 - 2¹ = 840193399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (840193421) 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, 38356 + ... + 56138.

It is an arithmetic number, because the mean of its divisors is an integer number (140049000).

Almost surely, 2^840193401 is an apocalyptic number.

It is an amenable number.

840193401 is a deficient number, since it is larger than the sum of its proper divisors (280198599).

840193401 is a wasteful number, since it uses less digits than its factorization.

840193401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33535.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 840193401 is about 28986.0897845846. The cubic root of 840193401 is about 943.6112037394.

The spelling of 840193401 in words is "eight hundred forty million, one hundred ninety-three thousand, four hundred one".