649942146 has 24 divisors (see below), whose sum is σ = 1609380864. Its totient is φ = 185697720.

The previous prime is 649942133. The next prime is 649942151. The reversal of 649942146 is 641249946.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2579010 + ... + 2579261.

It is an arithmetic number, because the mean of its divisors is an integer number (67057536).

Almost surely, 2^649942146 is an apocalyptic number.

649942146 is an abundant number, since it is smaller than the sum of its proper divisors (959438718).

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

649942146 is a wasteful number, since it uses less digits than its factorization.

649942146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158286 (or 5158283 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 649942146 is about 25493.9629324277. The cubic root of 649942146 is about 866.2134043747.

The spelling of 649942146 in words is "six hundred forty-nine million, nine hundred forty-two thousand, one hundred forty-six".