406647746 has 8 divisors (see below), whose sum is σ = 610423884. Its totient is φ = 203173120.

The previous prime is 406647737. The next prime is 406647749. The reversal of 406647746 is 647746604.

It can be written as a sum of positive squares in 2 ways, for example, as 404211025 + 2436721 = 20105^2 + 1561^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 406647697 and 406647706.

It is not an unprimeable number, because it can be changed into a prime (406647749) 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, 71975 + ... + 77418.

Almost surely, 2^406647746 is an apocalyptic number.

406647746 is a deficient number, since it is larger than the sum of its proper divisors (203776138).

406647746 is a wasteful number, since it uses less digits than its factorization.

406647746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150756.

The product of its (nonzero) digits is 677376, while the sum is 44.

The square root of 406647746 is about 20165.5088207563. The cubic root of 406647746 is about 740.8656451262.

The spelling of 406647746 in words is "four hundred six million, six hundred forty-seven thousand, seven hundred forty-six".