10649890 has 8 divisors (see below), whose sum is σ = 19169820. Its totient is φ = 4259952.

The previous prime is 10649869. The next prime is 10649893. The reversal of 10649890 is 9894601.

It can be written as a sum of positive squares in 2 ways, for example, as 9259849 + 1390041 = 3043^2 + 1179^2 .

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

It is a super-2 number, since 2×10649890² = 226840314024200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10649893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 532485 + ... + 532504.

Almost surely, 2^10649890 is an apocalyptic number.

10649890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10649890 is a deficient number, since it is larger than the sum of its proper divisors (8519930).

10649890 is a wasteful number, since it uses less digits than its factorization.

10649890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064996.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 10649890 is about 3263.4169209588. The cubic root of 10649890 is about 220.0130157589.

The spelling of 10649890 in words is "ten million, six hundred forty-nine thousand, eight hundred ninety".