400120303 has 4 divisors (see below), whose sum is σ = 436494888. Its totient is φ = 363745720.

The previous prime is 400120291. The next prime is 400120307. The reversal of 400120303 is 303021004.

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 400120303 - 2⁹ = 400119791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400120307) 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, 18187276 + ... + 18187297.

It is an arithmetic number, because the mean of its divisors is an integer number (109123722).

Almost surely, 2^400120303 is an apocalyptic number.

400120303 is a deficient number, since it is larger than the sum of its proper divisors (36374585).

400120303 is a wasteful number, since it uses less digits than its factorization.

400120303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36374584.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 400120303 is about 20003.0073488963. The cubic root of 400120303 is about 736.8801589976.

Adding to 400120303 its reverse (303021004), we get a palindrome (703141307).

The spelling of 400120303 in words is "four hundred million, one hundred twenty thousand, three hundred three".