400729206 has 16 divisors (see below), whose sum is σ = 801816048. Its totient is φ = 133516800.

The previous prime is 400729201. The next prime is 400729243. The reversal of 400729206 is 602927004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400729201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 966 + ... + 28326.

It is an arithmetic number, because the mean of its divisors is an integer number (50113503).

Almost surely, 2^400729206 is an apocalyptic number.

400729206 is an abundant number, since it is smaller than the sum of its proper divisors (401086842).

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

400729206 is a wasteful number, since it uses less digits than its factorization.

400729206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29807.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 400729206 is about 20018.2218491054. The cubic root of 400729206 is about 737.2537642388.

The spelling of 400729206 in words is "four hundred million, seven hundred twenty-nine thousand, two hundred six".