400795729 has 4 divisors (see below), whose sum is σ = 411628084. Its totient is φ = 389963376.

The previous prime is 400795727. The next prime is 400795753. The reversal of 400795729 is 927597004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 335622400 + 65173329 = 18320^2 + 8073^2 .

It is a cyclic number.

It is not a de Polignac number, because 400795729 - 2¹ = 400795727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400795727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5416122 + ... + 5416195.

It is an arithmetic number, because the mean of its divisors is an integer number (102907021).

Almost surely, 2^400795729 is an apocalyptic number.

It is an amenable number.

400795729 is a deficient number, since it is larger than the sum of its proper divisors (10832355).

400795729 is a wasteful number, since it uses less digits than its factorization.

400795729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10832354.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 400795729 is about 20019.8833413185. The cubic root of 400795729 is about 737.2945578868.

The spelling of 400795729 in words is "four hundred million, seven hundred ninety-five thousand, seven hundred twenty-nine".