10291940 has 24 divisors (see below), whose sum is σ = 21704760. Its totient is φ = 4099328.

The previous prime is 10291903. The next prime is 10291951. The reversal of 10291940 is 4919201.

10291940 = T₁₃₁ + T₁₃₂ + ... + T₃₉₉.

It can be written as a sum of positive squares in 4 ways, for example, as 719104 + 9572836 = 848^2 + 3094^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4424 + ... + 6336.

It is an arithmetic number, because the mean of its divisors is an integer number (904365).

Almost surely, 2^10291940 is an apocalyptic number.

10291940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10291940 is an abundant number, since it is smaller than the sum of its proper divisors (11412820).

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

10291940 is a wasteful number, since it uses less digits than its factorization.

10291940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2191 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 10291940 is about 3208.1053598659. The cubic root of 10291940 is about 217.5199435625.

The spelling of 10291940 in words is "ten million, two hundred ninety-one thousand, nine hundred forty".