15123920 has 80 divisors (see below), whose sum is σ = 40711680. Its totient is φ = 5117952.

The previous prime is 15123919. The next prime is 15123929. The reversal of 15123920 is 2932151.

15123920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15123929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63161 + ... + 63399.

It is an arithmetic number, because the mean of its divisors is an integer number (508896).

Almost surely, 2^15123920 is an apocalyptic number.

15123920 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 15123920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20355840).

15123920 is an abundant number, since it is smaller than the sum of its proper divisors (25587760).

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

15123920 is a wasteful number, since it uses less digits than its factorization.

15123920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 15123920 is about 3888.9484439884. The cubic root of 15123920 is about 247.2984857695.

The spelling of 15123920 in words is "fifteen million, one hundred twenty-three thousand, nine hundred twenty".