1401023643 has 8 divisors (see below), whose sum is σ = 1868675088. Its totient is φ = 933693984.

The previous prime is 1401023639. The next prime is 1401023681. The reversal of 1401023643 is 3463201041.

1401023643 is digitally balanced in base 4, 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 not a de Polignac number, because 1401023643 - 2² = 1401023639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1401023623) 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, 70096 + ... + 87837.

It is an arithmetic number, because the mean of its divisors is an integer number (233584386).

Almost surely, 2^1401023643 is an apocalyptic number.

1401023643 is a deficient number, since it is larger than the sum of its proper divisors (467651445).

1401023643 is a wasteful number, since it uses less digits than its factorization.

1401023643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160893.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 1401023643 is about 37430.2503731941. The cubic root of 1401023643 is about 1118.9615275861.

Adding to 1401023643 its reverse (3463201041), we get a palindrome (4864224684).

The spelling of 1401023643 in words is "one billion, four hundred one million, twenty-three thousand, six hundred forty-three".