10621690 has 8 divisors (see below), whose sum is σ = 19119060. Its totient is φ = 4248672.

The previous prime is 10621687. The next prime is 10621691. The reversal of 10621690 is 9612601.

It can be written as a sum of positive squares in 2 ways, for example, as 10439361 + 182329 = 3231^2 + 427^2 .

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

It is a super-2 number, since 2×10621690² = 225640596912200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10621691) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 531075 + ... + 531094.

Almost surely, 2^10621690 is an apocalyptic number.

10621690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10621690 is a deficient number, since it is larger than the sum of its proper divisors (8497370).

10621690 is a wasteful number, since it uses less digits than its factorization.

10621690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062176.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 10621690 is about 3259.0934322293. The cubic root of 10621690 is about 219.8186522075.

It can be divided in two parts, 10621 and 690, that added together give a palindrome (11311).

The spelling of 10621690 in words is "ten million, six hundred twenty-one thousand, six hundred ninety".