400323749 has 8 divisors (see below), whose sum is σ = 481592640. Its totient is φ = 325074816.

The previous prime is 400323733. The next prime is 400323793. The reversal of 400323749 is 947323004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400323749 - 2⁴ = 400323733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400323719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1504844 + ... + 1505109.

It is an arithmetic number, because the mean of its divisors is an integer number (60199080).

Almost surely, 2^400323749 is an apocalyptic number.

It is an amenable number.

400323749 is a deficient number, since it is larger than the sum of its proper divisors (81268891).

400323749 is a wasteful number, since it uses less digits than its factorization.

400323749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3009979.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 400323749 is about 20008.0920879528. The cubic root of 400323749 is about 737.0050297078.

The spelling of 400323749 in words is "four hundred million, three hundred twenty-three thousand, seven hundred forty-nine".