649146238 has 12 divisors (see below), whose sum is σ = 1054383048. Its totient is φ = 299605800.

The previous prime is 649146221. The next prime is 649146269. The reversal of 649146238 is 832641946.

It is a happy number.

It is a super-4 number, since 4×649146238⁴ (a number of 36 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 649146194 and 649146203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 959938 + ... + 960613.

It is an arithmetic number, because the mean of its divisors is an integer number (87865254).

Almost surely, 2^649146238 is an apocalyptic number.

649146238 is a deficient number, since it is larger than the sum of its proper divisors (405236810).

649146238 is a wasteful number, since it uses less digits than its factorization.

649146238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920579 (or 1920566 counting only the distinct ones).

The product of its digits is 248832, while the sum is 43.

The square root of 649146238 is about 25478.3484158609. The cubic root of 649146238 is about 865.8596765883.

The spelling of 649146238 in words is "six hundred forty-nine million, one hundred forty-six thousand, two hundred thirty-eight".