10649940 has 48 divisors (see below), whose sum is σ = 34081152. Its totient is φ = 2434176.

The previous prime is 10649927. The next prime is 10649953. The reversal of 10649940 is 4994601.

It is an interprime number because it is at equal distance from previous prime (10649927) and next prime (10649953).

It is a super-2 number, since 2×10649940² = 226842444007200, which contains 22 as substring.

It is a congruent number.

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, 12259 + ... + 13098.

It is an arithmetic number, because the mean of its divisors is an integer number (710024).

Almost surely, 2^10649940 is an apocalyptic number.

10649940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10649940 is an abundant number, since it is smaller than the sum of its proper divisors (23431212).

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

10649940 is a wasteful number, since it uses less digits than its factorization.

10649940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25376 (or 25374 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 10649940 is about 3263.4245816320. The cubic root of 10649940 is about 220.0133600702.

The spelling of 10649940 in words is "ten million, six hundred forty-nine thousand, nine hundred forty".