649340898 has 32 divisors (see below), whose sum is σ = 1338133824. Its totient is φ = 209909952.

The previous prime is 649340897. The next prime is 649340947. The reversal of 649340898 is 898043946.

It is a happy number.

649340898 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 649340898.

It is not an unprimeable number, because it can be changed into a prime (649340897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65761 + ... + 74987.

It is an arithmetic number, because the mean of its divisors is an integer number (41816682).

Almost surely, 2^649340898 is an apocalyptic number.

649340898 is an abundant number, since it is smaller than the sum of its proper divisors (688792926).

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

649340898 is a wasteful number, since it uses less digits than its factorization.

649340898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9586.

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 649340898 is about 25482.1682358468. The cubic root of 649340898 is about 865.9462166158.

The spelling of 649340898 in words is "six hundred forty-nine million, three hundred forty thousand, eight hundred ninety-eight".