402471881 has 8 divisors (see below), whose sum is σ = 466833600. Its totient is φ = 339826608.

The previous prime is 402471841. The next prime is 402471941. The reversal of 402471881 is 188174204.

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

It is a cyclic number.

It is not a de Polignac number, because 402471881 - 2¹⁸ = 402209737 is a prime.

It is a super-2 number, since 2×402471881² = 323967229991356322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402471841) 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, 428606 + ... + 429543.

It is an arithmetic number, because the mean of its divisors is an integer number (58354200).

Almost surely, 2^402471881 is an apocalyptic number.

It is an amenable number.

402471881 is a deficient number, since it is larger than the sum of its proper divisors (64361719).

402471881 is an equidigital number, since it uses as much as digits as its factorization.

402471881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858223.

The product of its (nonzero) digits is 14336, while the sum is 35.

The square root of 402471881 is about 20061.7018470518. The cubic root of 402471881 is about 738.3209319182.

The spelling of 402471881 in words is "four hundred two million, four hundred seventy-one thousand, eight hundred eighty-one".