400735243 has 4 divisors (see below), whose sum is σ = 400776448. Its totient is φ = 400694040.

The previous prime is 400735229. The next prime is 400735249. The reversal of 400735243 is 342537004.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400735243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400735249) 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, 2998 + ... + 28468.

It is an arithmetic number, because the mean of its divisors is an integer number (100194112).

Almost surely, 2^400735243 is an apocalyptic number.

400735243 is a deficient number, since it is larger than the sum of its proper divisors (41205).

400735243 is a wasteful number, since it uses less digits than its factorization.

400735243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41204.

The product of its (nonzero) digits is 10080, while the sum is 28.

The square root of 400735243 is about 20018.3726361560. The cubic root of 400735243 is about 737.2574664718.

The spelling of 400735243 in words is "four hundred million, seven hundred thirty-five thousand, two hundred forty-three".