10491620 has 24 divisors (see below), whose sum is σ = 22793400. Its totient is φ = 4051712.

The previous prime is 10491571. The next prime is 10491623. The reversal of 10491620 is 2619401.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3125824 + 7365796 = 1768^2 + 2714^2 .

It is a super-2 number, since 2×10491620² = 220148180448800, which contains 22 as substring.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (10491623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8465 + ... + 9624.

It is an arithmetic number, because the mean of its divisors is an integer number (949725).

Almost surely, 2^10491620 is an apocalyptic number.

10491620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10491620 is an abundant number, since it is smaller than the sum of its proper divisors (12301780).

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

10491620 is a wasteful number, since it uses less digits than its factorization.

10491620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18127 (or 18125 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 10491620 is about 3239.0770290316. The cubic root of 10491620 is about 218.9176869338.

It can be divided in two parts, 10491 and 620, that added together give a palindrome (11111).

The spelling of 10491620 in words is "ten million, four hundred ninety-one thousand, six hundred twenty".