649384449 has 16 divisors (see below), whose sum is σ = 999338880. Its totient is φ = 367401600.

The previous prime is 649384429. The next prime is 649384453. The reversal of 649384449 is 944483946.

It is not a de Polignac number, because 649384449 - 2⁷ = 649384321 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649384429) 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, 150964 + ... + 155205.

It is an arithmetic number, because the mean of its divisors is an integer number (62458680).

Almost surely, 2^649384449 is an apocalyptic number.

It is an amenable number.

649384449 is a deficient number, since it is larger than the sum of its proper divisors (349954431).

649384449 is a wasteful number, since it uses less digits than its factorization.

649384449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306280.

The product of its digits is 2985984, while the sum is 51.

The square root of 649384449 is about 25483.0227602614. The cubic root of 649384449 is about 865.9655757233.

The spelling of 649384449 in words is "six hundred forty-nine million, three hundred eighty-four thousand, four hundred forty-nine".