400271801 has 4 divisors (see below), whose sum is σ = 405909504. Its totient is φ = 394634100.

The previous prime is 400271791. The next prime is 400271849. The reversal of 400271801 is 108172004.

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 400271801 - 2²² = 396077497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400273801) 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 3 ways as a sum of consecutive naturals, for example, 2818745 + ... + 2818886.

It is an arithmetic number, because the mean of its divisors is an integer number (101477376).

Almost surely, 2^400271801 is an apocalyptic number.

It is an amenable number.

400271801 is a deficient number, since it is larger than the sum of its proper divisors (5637703).

400271801 is an equidigital number, since it uses as much as digits as its factorization.

400271801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5637702.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 400271801 is about 20006.7938710829. The cubic root of 400271801 is about 736.9731491831.

The spelling of 400271801 in words is "four hundred million, two hundred seventy-one thousand, eight hundred one".