400534871 has 8 divisors (see below), whose sum is σ = 438505488. Its totient is φ = 362824000.

The previous prime is 400534853. The next prime is 400534873. The reversal of 400534871 is 178435004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400534871 - 2²⁶ = 333426007 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 (400534873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61700 + ... + 67881.

It is an arithmetic number, because the mean of its divisors is an integer number (54813186).

Almost surely, 2^400534871 is an apocalyptic number.

400534871 is a deficient number, since it is larger than the sum of its proper divisors (37970617).

400534871 is a wasteful number, since it uses less digits than its factorization.

400534871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129873.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 400534871 is about 20013.3673078770. The cubic root of 400534871 is about 737.1345670562.

Adding to 400534871 its reverse (178435004), we get a palindrome (578969875).

The spelling of 400534871 in words is "four hundred million, five hundred thirty-four thousand, eight hundred seventy-one".