649039934 has 8 divisors (see below), whose sum is σ = 986896560. Its totient is φ = 320074416.

The previous prime is 649039933. The next prime is 649039999. The reversal of 649039934 is 439930946.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649039933) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2222594 + ... + 2222885.

It is an arithmetic number, because the mean of its divisors is an integer number (123362070).

Almost surely, 2^649039934 is an apocalyptic number.

649039934 is a deficient number, since it is larger than the sum of its proper divisors (337856626).

649039934 is a wasteful number, since it uses less digits than its factorization.

649039934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4445554.

The product of its (nonzero) digits is 629856, while the sum is 47.

The square root of 649039934 is about 25476.2621669663. The cubic root of 649039934 is about 865.8124096981.

The spelling of 649039934 in words is "six hundred forty-nine million, thirty-nine thousand, nine hundred thirty-four".