401900643 has 32 divisors (see below), whose sum is σ = 633070080. Its totient is φ = 251428320.

The previous prime is 401900633. The next prime is 401900651. The reversal of 401900643 is 346009104.

401900643 is a `hidden beast` number, since 4 + 0 + 19 + 0 + 0 + 643 = 666.

It is not a de Polignac number, because 401900643 - 2⁶ = 401900579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (401900633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26808 + ... + 39018.

It is an arithmetic number, because the mean of its divisors is an integer number (19783440).

Almost surely, 2^401900643 is an apocalyptic number.

401900643 is a deficient number, since it is larger than the sum of its proper divisors (231169437).

401900643 is a wasteful number, since it uses less digits than its factorization.

401900643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12296 (or 12290 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 401900643 is about 20047.4597642694. The cubic root of 401900643 is about 737.9714609891.

Adding to 401900643 its reverse (346009104), we get a palindrome (747909747).

The spelling of 401900643 in words is "four hundred one million, nine hundred thousand, six hundred forty-three".