15340240 has 40 divisors (see below), whose sum is σ = 35834760. Its totient is φ = 6107136.

The previous prime is 15340229. The next prime is 15340261. The reversal of 15340240 is 4204351.

It can be written as a sum of positive squares in 4 ways, for example, as 5184 + 15335056 = 72^2 + 3916^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 26676 + ... + 27244.

It is an arithmetic number, because the mean of its divisors is an integer number (895869).

Almost surely, 2^15340240 is an apocalyptic number.

15340240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15340240 is an abundant number, since it is smaller than the sum of its proper divisors (20494520).

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

15340240 is a wasteful number, since it uses less digits than its factorization.

15340240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 15340240 is about 3916.6618439687. The cubic root of 15340240 is about 248.4719593961.

Adding to 15340240 its reverse (4204351), we get a palindrome (19544591).

The spelling of 15340240 in words is "fifteen million, three hundred forty thousand, two hundred forty".