402400111 has 8 divisors (see below), whose sum is σ = 420165504. Its totient is φ = 384657240.

The previous prime is 402400109. The next prime is 402400127. The reversal of 402400111 is 111004204.

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 402400111 - 2¹ = 402400109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 402400091 and 402400100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402400171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38256 + ... + 47626.

It is an arithmetic number, because the mean of its divisors is an integer number (52520688).

Almost surely, 2^402400111 is an apocalyptic number.

402400111 is a deficient number, since it is larger than the sum of its proper divisors (17765393).

402400111 is a wasteful number, since it uses less digits than its factorization.

402400111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11261.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 402400111 is about 20059.9130357038. The cubic root of 402400111 is about 738.2770427706.

Adding to 402400111 its reverse (111004204), we get a palindrome (513404315).

The spelling of 402400111 in words is "four hundred two million, four hundred thousand, one hundred eleven".