15123380 has 48 divisors (see below), whose sum is σ = 33094656. Its totient is φ = 5800320.

The previous prime is 15123371. The next prime is 15123419. The reversal of 15123380 is 8332151.

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 15 ways as a sum of consecutive naturals, for example, 79085 + ... + 79275.

It is an arithmetic number, because the mean of its divisors is an integer number (689472).

Almost surely, 2^15123380 is an apocalyptic number.

15123380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15123380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16547328).

15123380 is an abundant number, since it is smaller than the sum of its proper divisors (17971276).

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

15123380 is a wasteful number, since it uses less digits than its factorization.

15123380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 15123380 is about 3888.8790158605. The cubic root of 15123380 is about 247.2955424679.

The spelling of 15123380 in words is "fifteen million, one hundred twenty-three thousand, three hundred eighty".