15342890 has 8 divisors (see below), whose sum is σ = 27617220. Its totient is φ = 6137152.

The previous prime is 15342883. The next prime is 15342893. The reversal of 15342890 is 9824351.

15342890 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3917²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 15342889 + 1 = 3917^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (15342893) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 767135 + ... + 767154.

Almost surely, 2^15342890 is an apocalyptic number.

15342890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15342890 is a deficient number, since it is larger than the sum of its proper divisors (12274330).

15342890 is a wasteful number, since it uses less digits than its factorization.

15342890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534296.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 15342890 is about 3917.0001276487. Note that the first 3 decimals coincide. The cubic root of 15342890 is about 248.4862662731.

The spelling of 15342890 in words is "fifteen million, three hundred forty-two thousand, eight hundred ninety".