400140361 has 24 divisors (see below), whose sum is σ = 451513440. Its totient is φ = 353390400.

The previous prime is 400140353. The next prime is 400140383. The reversal of 400140361 is 163041004.

It is a happy number.

It is not a de Polignac number, because 400140361 - 2³ = 400140353 is a prime.

It is a super-2 number, since 2×400140361² = 320224617002420642, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400140341) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 411606 + ... + 412576.

It is an arithmetic number, because the mean of its divisors is an integer number (18813060).

Almost surely, 2^400140361 is an apocalyptic number.

400140361 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

400140361 is a deficient number, since it is larger than the sum of its proper divisors (51373079).

400140361 is a wasteful number, since it uses less digits than its factorization.

400140361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077 (or 1054 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 400140361 is about 20003.5087172226. The cubic root of 400140361 is about 736.8924720404.

Adding to 400140361 its reverse (163041004), we get a palindrome (563181365).

The spelling of 400140361 in words is "four hundred million, one hundred forty thousand, three hundred sixty-one".