406661236 has 12 divisors (see below), whose sum is σ = 717955812. Its totient is φ = 201531008.

The previous prime is 406661221. The next prime is 406661251. The reversal of 406661236 is 632166604.

It is an interprime number because it is at equal distance from previous prime (406661221) and next prime (406661251).

It can be written as a sum of positive squares in 2 ways, for example, as 10890000 + 395771236 = 3300^2 + 19894^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449395 + ... + 450298.

It is an arithmetic number, because the mean of its divisors is an integer number (59829651).

Almost surely, 2^406661236 is an apocalyptic number.

It is an amenable number.

406661236 is a deficient number, since it is larger than the sum of its proper divisors (311294576).

406661236 is a wasteful number, since it uses less digits than its factorization.

406661236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899810 (or 899808 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 406661236 is about 20165.8432999962. The cubic root of 406661236 is about 740.8738374475.

It can be divided in two parts, 40666123 and 6, that added together give a square (40666129 = 6377²).

The spelling of 406661236 in words is "four hundred six million, six hundred sixty-one thousand, two hundred thirty-six".