649791470 has 16 divisors (see below), whose sum is σ = 1174076640. Its totient is φ = 258927264.

The previous prime is 649791451. The next prime is 649791473. The reversal of 649791470 is 74197946.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649791473) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120905 + ... + 126164.

It is an arithmetic number, because the mean of its divisors is an integer number (73379790).

Almost surely, 2^649791470 is an apocalyptic number.

649791470 is a deficient number, since it is larger than the sum of its proper divisors (524285170).

649791470 is a wasteful number, since it uses less digits than its factorization.

649791470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247339.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 649791470 is about 25491.0076301428. The cubic root of 649791470 is about 866.1464611557.

The spelling of 649791470 in words is "six hundred forty-nine million, seven hundred ninety-one thousand, four hundred seventy".