15220390 has 16 divisors (see below), whose sum is σ = 27806832. Its totient is φ = 5997024.

The previous prime is 15220379. The next prime is 15220391. The reversal of 15220390 is 9302251.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15220391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10689 + ... + 12028.

It is an arithmetic number, because the mean of its divisors is an integer number (1737927).

Almost surely, 2^15220390 is an apocalyptic number.

15220390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15220390 is a deficient number, since it is larger than the sum of its proper divisors (12586442).

15220390 is a wasteful number, since it uses less digits than its factorization.

15220390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22791.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 15220390 is about 3901.3318238776. The cubic root of 15220390 is about 247.8231808465.

The spelling of 15220390 in words is "fifteen million, two hundred twenty thousand, three hundred ninety".