400402323 has 12 divisors (see below), whose sum is σ = 584322648. Its totient is φ = 264182400.

The previous prime is 400402319. The next prime is 400402337. The reversal of 400402323 is 323204004.

It is not a de Polignac number, because 400402323 - 2² = 400402319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400402296 and 400402305.

It is not an unprimeable number, because it can be changed into a prime (400402313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228453 + ... + 230198.

It is an arithmetic number, because the mean of its divisors is an integer number (48693554).

Almost surely, 2^400402323 is an apocalyptic number.

400402323 is a deficient number, since it is larger than the sum of its proper divisors (183920325).

400402323 is a wasteful number, since it uses less digits than its factorization.

400402323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458754 (or 458751 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 400402323 is about 20010.0555471493. The cubic root of 400402323 is about 737.0532453874.

Adding to 400402323 its reverse (323204004), we get a palindrome (723606327).

The spelling of 400402323 in words is "four hundred million, four hundred two thousand, three hundred twenty-three".