649228690 has 32 divisors (see below), whose sum is σ = 1284050880. Its totient is φ = 234379200.

The previous prime is 649228687. The next prime is 649228711. The reversal of 649228690 is 96822946.

It is a super-2 number, since 2×649228690² = 842995783838232200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 649228690.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5941 + ... + 36520.

It is an arithmetic number, because the mean of its divisors is an integer number (40126590).

Almost surely, 2^649228690 is an apocalyptic number.

649228690 is a deficient number, since it is larger than the sum of its proper divisors (634822190).

649228690 is a wasteful number, since it uses less digits than its factorization.

649228690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42618.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 649228690 is about 25479.9664442479. The cubic root of 649228690 is about 865.8963343990.

The spelling of 649228690 in words is "six hundred forty-nine million, two hundred twenty-eight thousand, six hundred ninety".