406890249 has 4 divisors (see below), whose sum is σ = 542520336. Its totient is φ = 271260164.

The previous prime is 406890199. The next prime is 406890259. The reversal of 406890249 is 942098604.

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 406890249 - 2⁸ = 406889993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406890249.

It is not an unprimeable number, because it can be changed into a prime (406890259) 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, 67815039 + ... + 67815044.

It is an arithmetic number, because the mean of its divisors is an integer number (135630084).

Almost surely, 2^406890249 is an apocalyptic number.

It is an amenable number.

406890249 is a deficient number, since it is larger than the sum of its proper divisors (135630087).

406890249 is a wasteful number, since it uses less digits than its factorization.

406890249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135630086.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 406890249 is about 20171.5207408861. The cubic root of 406890249 is about 741.0128867634.

The spelling of 406890249 in words is "four hundred six million, eight hundred ninety thousand, two hundred forty-nine".