401135823 has 12 divisors (see below), whose sum is σ = 632092968. Its totient is φ = 243112560.

The previous prime is 401135821. The next prime is 401135827. The reversal of 401135823 is 328531104.

It is a happy number.

It is not a de Polignac number, because 401135823 - 2¹ = 401135821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401135821) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2025840 + ... + 2026037.

It is an arithmetic number, because the mean of its divisors is an integer number (52674414).

Almost surely, 2^401135823 is an apocalyptic number.

401135823 is a deficient number, since it is larger than the sum of its proper divisors (230957145).

401135823 is a wasteful number, since it uses less digits than its factorization.

401135823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051894 (or 4051891 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 401135823 is about 20028.3754458518. The cubic root of 401135823 is about 737.5030419486.

Adding to 401135823 its reverse (328531104), we get a palindrome (729666927).

The spelling of 401135823 in words is "four hundred one million, one hundred thirty-five thousand, eight hundred twenty-three".