15342240 has 48 divisors (see below), whose sum is σ = 48329568. Its totient is φ = 4091136.

The previous prime is 15342233. The next prime is 15342251. The reversal of 15342240 is 4224351.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15502 + ... + 16461.

It is an arithmetic number, because the mean of its divisors is an integer number (1006866).

Almost surely, 2^15342240 is an apocalyptic number.

15342240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15342240 is an abundant number, since it is smaller than the sum of its proper divisors (32987328).

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

15342240 is a wasteful number, since it uses less digits than its factorization.

15342240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31981 (or 31973 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 15342240 is about 3916.9171551106. The cubic root of 15342240 is about 248.4827571916.

Adding to 15342240 its reverse (4224351), we get a palindrome (19566591).

The spelling of 15342240 in words is "fifteen million, three hundred forty-two thousand, two hundred forty".