400745353 has 4 divisors (see below), whose sum is σ = 418169088. Its totient is φ = 383321620.

The previous prime is 400745351. The next prime is 400745363. The reversal of 400745353 is 353547004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400745353 - 2¹ = 400745351 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400745351) 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, 8711833 + ... + 8711878.

It is an arithmetic number, because the mean of its divisors is an integer number (104542272).

Almost surely, 2^400745353 is an apocalyptic number.

It is an amenable number.

400745353 is a deficient number, since it is larger than the sum of its proper divisors (17423735).

400745353 is a wasteful number, since it uses less digits than its factorization.

400745353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17423734.

The product of its (nonzero) digits is 25200, while the sum is 31.

The square root of 400745353 is about 20018.6251525923. The cubic root of 400745353 is about 737.2636664175.

The spelling of 400745353 in words is "four hundred million, seven hundred forty-five thousand, three hundred fifty-three".