649407406 has 16 divisors (see below), whose sum is σ = 1006387200. Its totient is φ = 313962840.

The previous prime is 649407391. The next prime is 649407419. The reversal of 649407406 is 604704946.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82995 + ... + 90481.

It is an arithmetic number, because the mean of its divisors is an integer number (62899200).

Almost surely, 2^649407406 is an apocalyptic number.

649407406 is a deficient number, since it is larger than the sum of its proper divisors (356979794).

649407406 is a wasteful number, since it uses less digits than its factorization.

649407406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8919.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 649407406 is about 25483.4731934248. The cubic root of 649407406 is about 865.9757801240.

The spelling of 649407406 in words is "six hundred forty-nine million, four hundred seven thousand, four hundred six".