15420244 has 24 divisors (see below), whose sum is σ = 31425408. Its totient is φ = 6483360.

The previous prime is 15420221. The next prime is 15420253. The reversal of 15420244 is 44202451.

15420244 = 497² + 498² + ... + 552².

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 3712 + ... + 6679.

It is an arithmetic number, because the mean of its divisors is an integer number (1309392).

Almost surely, 2^15420244 is an apocalyptic number.

15420244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

15420244 is an abundant number, since it is smaller than the sum of its proper divisors (16005164).

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

15420244 is a wasteful number, since it uses less digits than its factorization.

15420244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10455 (or 10453 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 15420244 is about 3926.8618514025. The cubic root of 15420244 is about 248.9031628305.

Adding to 15420244 its reverse (44202451), we get a palindrome (59622695).

It can be divided in two parts, 1 and 5420244, that added together give a palindrome (5420245).

The spelling of 15420244 in words is "fifteen million, four hundred twenty thousand, two hundred forty-four".