15243390 has 128 divisors (see below), whose sum is σ = 44634240. Its totient is φ = 3732480.

The previous prime is 15243379. The next prime is 15243401. The reversal of 15243390 is 9334251.

It is an interprime number because it is at equal distance from previous prime (15243379) and next prime (15243401).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 63 ways as a sum of consecutive naturals, for example, 371770 + ... + 371810.

It is an arithmetic number, because the mean of its divisors is an integer number (348705).

It is a vampire number, since it can be written as 3321 ⋅ 4590 (with its own digits).

Almost surely, 2^15243390 is an apocalyptic number.

15243390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15243390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22317120).

15243390 is an abundant number, since it is smaller than the sum of its proper divisors (29390850).

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

15243390 is an equidigital number, since it uses as much as digits as its factorization.

15243390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 15243390 is about 3904.2784224489. The cubic root of 15243390 is about 247.9479491005.

The spelling of 15243390 in words is "fifteen million, two hundred forty-three thousand, three hundred ninety".