649329450 has 192 divisors, whose sum is σ = 2126435328. Its totient is φ = 126950400.

The previous prime is 649329437. The next prime is 649329451. The reversal of 649329450 is 54923946.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (649329451) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 194697 + ... + 198003.

It is an arithmetic number, because the mean of its divisors is an integer number (11075184).

Almost surely, 2^649329450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649329450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1063217664).

649329450 is an abundant number, since it is smaller than the sum of its proper divisors (1477105878).

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

649329450 is a wasteful number, since it uses less digits than its factorization.

649329450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357 (or 3352 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 649329450 is about 25481.9436071898. The cubic root of 649329450 is about 865.9411276553.

The spelling of 649329450 in words is "six hundred forty-nine million, three hundred twenty-nine thousand, four hundred fifty".