15220890 has 48 divisors (see below), whose sum is σ = 39907296. Its totient is φ = 4024800.

The previous prime is 15220889. The next prime is 15220897. The reversal of 15220890 is 9802251.

It is not an unprimeable number, because it can be changed into a prime (15220897) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11145 + ... + 12435.

It is an arithmetic number, because the mean of its divisors is an integer number (831402).

Almost surely, 2^15220890 is an apocalyptic number.

15220890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15220890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19953648).

15220890 is an abundant number, since it is smaller than the sum of its proper divisors (24686406).

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

15220890 is a wasteful number, since it uses less digits than its factorization.

15220890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1432 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 15220890 is about 3901.3959040323. The cubic root of 15220890 is about 247.8258945360.

It can be divided in two parts, 15220 and 890, that added together give a triangular number (16110 = T₁₇₉).

The spelling of 15220890 in words is "fifteen million, two hundred twenty thousand, eight hundred ninety".