15423840 has 72 divisors (see below), whose sum is σ = 52638768. Its totient is φ = 4112640.

The previous prime is 15423829. The next prime is 15423841. The reversal of 15423840 is 4832451.

15423840 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 (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15423841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3916 + ... + 6795.

It is an arithmetic number, because the mean of its divisors is an integer number (731094).

Almost surely, 2^15423840 is an apocalyptic number.

15423840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15423840 is an abundant number, since it is smaller than the sum of its proper divisors (37214928).

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

15423840 is a wasteful number, since it uses less digits than its factorization.

15423840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10732 (or 10721 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 15423840 is about 3927.3196966888. The cubic root of 15423840 is about 248.9225093944.

The spelling of 15423840 in words is "fifteen million, four hundred twenty-three thousand, eight hundred forty".