400404102 has 64 divisors (see below), whose sum is σ = 988001280. Its totient is φ = 105646464.

The previous prime is 400404083. The next prime is 400404113. The reversal of 400404102 is 201404004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20868 + ... + 35160.

It is an arithmetic number, because the mean of its divisors is an integer number (15437520).

Almost surely, 2^400404102 is an apocalyptic number.

400404102 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 400404102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (494000640).

400404102 is an abundant number, since it is smaller than the sum of its proper divisors (587597178).

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

400404102 is a wasteful number, since it uses less digits than its factorization.

400404102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14357.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 400404102 is about 20010.0999997501. The cubic root of 400404102 is about 737.0543369693.

Adding to 400404102 its reverse (201404004), we get a palindrome (601808106).

The spelling of 400404102 in words is "four hundred million, four hundred four thousand, one hundred two".