649162080 has 192 divisors, whose sum is σ = 2596769280. Its totient is φ = 148372992.

The previous prime is 649162069. The next prime is 649162081. The reversal of 649162080 is 80261946.

649162080 is a `hidden beast` number, since 649 + 1 + 6 + 2 + 0 + 8 + 0 = 666.

It is a super-2 number, since 2×649162080² = 842822812219852800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649162081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19507 + ... + 40973.

It is an arithmetic number, because the mean of its divisors is an integer number (13524840).

Almost surely, 2^649162080 is an apocalyptic number.

649162080 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649162080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1298384640).

649162080 is an abundant number, since it is smaller than the sum of its proper divisors (1947607200).

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

649162080 is a wasteful number, since it uses less digits than its factorization.

649162080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21498 (or 21484 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 649162080 is about 25478.6593053873. The cubic root of 649162080 is about 865.8667201155.

The spelling of 649162080 in words is "six hundred forty-nine million, one hundred sixty-two thousand, eighty".