400134906 has 24 divisors (see below), whose sum is σ = 870753780. Its totient is φ = 132794496.

The previous prime is 400134901. The next prime is 400134907. The reversal of 400134906 is 609431004.

It can be written as a sum of positive squares in 2 ways, for example, as 307686681 + 92448225 = 17541^2 + 9615^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 400134906.

It is not an unprimeable number, because it can be changed into a prime (400134901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44415 + ... + 52658.

Almost surely, 2^400134906 is an apocalyptic number.

400134906 is an abundant number, since it is smaller than the sum of its proper divisors (470618874).

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

400134906 is a wasteful number, since it uses less digits than its factorization.

400134906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97310 (or 97307 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 400134906 is about 20003.3723656787. The cubic root of 400134906 is about 736.8891234098.

The spelling of 400134906 in words is "four hundred million, one hundred thirty-four thousand, nine hundred six".