10621390 has 16 divisors (see below), whose sum is σ = 20589408. Its totient is φ = 3921696.

The previous prime is 10621343. The next prime is 10621397. The reversal of 10621390 is 9312601.

It is a super-2 number, since 2×10621390² = 225627851064200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10621397) 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, 40722 + ... + 40981.

It is an arithmetic number, because the mean of its divisors is an integer number (1286838).

Almost surely, 2^10621390 is an apocalyptic number.

10621390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

10621390 is a deficient number, since it is larger than the sum of its proper divisors (9968018).

10621390 is a wasteful number, since it uses less digits than its factorization.

10621390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81723.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 10621390 is about 3259.0474068353. The cubic root of 10621390 is about 219.8165826619.

Adding to 10621390 its reverse (9312601), we get a palindrome (19933991).

It can be divided in two parts, 10621 and 390, that added together give a palindrome (11011).

The spelling of 10621390 in words is "ten million, six hundred twenty-one thousand, three hundred ninety".