400748323 has 4 divisors (see below), whose sum is σ = 421840360. Its totient is φ = 379656288.

The previous prime is 400748281. The next prime is 400748329. The reversal of 400748323 is 323847004.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 400748323 - 2¹⁷ = 400617251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400748329) 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, 10545990 + ... + 10546027.

It is an arithmetic number, because the mean of its divisors is an integer number (105460090).

Almost surely, 2^400748323 is an apocalyptic number.

400748323 is a deficient number, since it is larger than the sum of its proper divisors (21092037).

400748323 is a wasteful number, since it uses less digits than its factorization.

400748323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21092036.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 400748323 is about 20018.6993333733. The cubic root of 400748323 is about 737.2654877467.

The spelling of 400748323 in words is "four hundred million, seven hundred forty-eight thousand, three hundred twenty-three".