400129356 has 48 divisors (see below), whose sum is σ = 1053642240. Its totient is φ = 117069120.

The previous prime is 400129351. The next prime is 400129361. The reversal of 400129356 is 653921004.

It is an interprime number because it is at equal distance from previous prime (400129351) and next prime (400129361).

It is not an unprimeable number, because it can be changed into a prime (400129351) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48436 + ... + 56091.

It is an arithmetic number, because the mean of its divisors is an integer number (21950880).

Almost surely, 2^400129356 is an apocalyptic number.

It is an amenable number.

400129356 is an abundant number, since it is smaller than the sum of its proper divisors (653512884).

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

400129356 is a wasteful number, since it uses less digits than its factorization.

400129356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104574 (or 104572 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 400129356 is about 20003.2336385895. The cubic root of 400129356 is about 736.8857164309.

The spelling of 400129356 in words is "four hundred million, one hundred twenty-nine thousand, three hundred fifty-six".