649862080 has 112 divisors (see below), whose sum is σ = 1816583616. Its totient is φ = 216760320.

The previous prime is 649862071. The next prime is 649862089. The reversal of 649862080 is 80268946.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (649862071) and next prime (649862089).

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649862089) 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, 78960 + ... + 86800.

Almost surely, 2^649862080 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649862080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908291808).

649862080 is an abundant number, since it is smaller than the sum of its proper divisors (1166721536).

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

649862080 is a wasteful number, since it uses less digits than its factorization.

649862080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7902 (or 7892 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 649862080 is about 25492.3925907318. The cubic root of 649862080 is about 866.1778334699.

The spelling of 649862080 in words is "six hundred forty-nine million, eight hundred sixty-two thousand, eighty".