400134744 has 96 divisors (see below), whose sum is σ = 1123340400. Its totient is φ = 128578560.

The previous prime is 400134733. The next prime is 400134751. The reversal of 400134744 is 447431004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 261967 + ... + 263489.

Almost surely, 2^400134744 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 400134744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (561670200).

400134744 is an abundant number, since it is smaller than the sum of its proper divisors (723205656).

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

400134744 is a wasteful number, since it uses less digits than its factorization.

400134744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1665 (or 1658 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 400134744 is about 20003.3683163611. The cubic root of 400134744 is about 736.8890239633.

Adding to 400134744 its reverse (447431004), we get a palindrome (847565748).

The spelling of 400134744 in words is "four hundred million, one hundred thirty-four thousand, seven hundred forty-four".