649299318 has 8 divisors (see below), whose sum is σ = 1298598648. Its totient is φ = 216433104.

The previous prime is 649299317. The next prime is 649299319. The reversal of 649299318 is 813992946.

It is an interprime number because it is at equal distance from previous prime (649299317) and next prime (649299319).

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

649299318 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649299317) 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, 54108271 + ... + 54108282.

It is an arithmetic number, because the mean of its divisors is an integer number (162324831).

Almost surely, 2^649299318 is an apocalyptic number.

649299318 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649299318 is a wasteful number, since it uses less digits than its factorization.

649299318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108216558.

The product of its digits is 839808, while the sum is 51.

The square root of 649299318 is about 25481.3523581461. The cubic root of 649299318 is about 865.9277328413.

It can be divided in two parts, 64929 and 9318, that added together give a palindrome (74247).

The spelling of 649299318 in words is "six hundred forty-nine million, two hundred ninety-nine thousand, three hundred eighteen".