400341172 has 144 divisors (see below), whose sum is σ = 971006400. Its totient is φ = 142248960.

The previous prime is 400341167. The next prime is 400341173. The reversal of 400341172 is 271143004.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400341173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1187788 + ... + 1188124.

It is an arithmetic number, because the mean of its divisors is an integer number (6743100).

Almost surely, 2^400341172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400341172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485503200).

400341172 is an abundant number, since it is smaller than the sum of its proper divisors (570665228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400341172 is a wasteful number, since it uses less digits than its factorization.

400341172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414 (or 405 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 400341172 is about 20008.5274820512. The cubic root of 400341172 is about 737.0157215977.

Adding to 400341172 its reverse (271143004), we get a palindrome (671484176).

The spelling of 400341172 in words is "four hundred million, three hundred forty-one thousand, one hundred seventy-two".