400113132 has 12 divisors (see below), whose sum is σ = 933597336. Its totient is φ = 133371040.

The previous prime is 400113121. The next prime is 400113143. The reversal of 400113132 is 231311004.

It is an interprime number because it is at equal distance from previous prime (400113121) and next prime (400113143).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16671369 + ... + 16671392.

It is an arithmetic number, because the mean of its divisors is an integer number (77799778).

Almost surely, 2^400113132 is an apocalyptic number.

It is an amenable number.

400113132 is an abundant number, since it is smaller than the sum of its proper divisors (533484204).

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

400113132 is a wasteful number, since it uses less digits than its factorization.

400113132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33342768 (or 33342766 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 400113132 is about 20002.8281000463. The cubic root of 400113132 is about 736.8757568222.

Adding to 400113132 its reverse (231311004), we get a palindrome (631424136).

The spelling of 400113132 in words is "four hundred million, one hundred thirteen thousand, one hundred thirty-two".