406020881 has 4 divisors (see below), whose sum is σ = 464023872. Its totient is φ = 348017892.

The previous prime is 406020847. The next prime is 406020887. The reversal of 406020881 is 188020604.

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 406020881 - 2¹⁴ = 406004497 is a prime.

It is a super-2 number, since 2×406020881² = 329705911616032322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406020887) 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, 29001485 + ... + 29001498.

It is an arithmetic number, because the mean of its divisors is an integer number (116005968).

Almost surely, 2^406020881 is an apocalyptic number.

It is an amenable number.

406020881 is a deficient number, since it is larger than the sum of its proper divisors (58002991).

406020881 is an equidigital number, since it uses as much as digits as its factorization.

406020881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58002990.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 406020881 is about 20149.9598262627. The cubic root of 406020881 is about 740.4847572493.

The spelling of 406020881 in words is "four hundred six million, twenty thousand, eight hundred eighty-one".