13047890 has 16 divisors (see below), whose sum is σ = 23582232. Its totient is φ = 5197824.

The previous prime is 13047871. The next prime is 13047893. The reversal of 13047890 is 9874031.

It can be written as a sum of positive squares in 4 ways, for example, as 12652249 + 395641 = 3557^2 + 629^2 .

It is not an unprimeable number, because it can be changed into a prime (13047893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32 + ... + 5108.

Almost surely, 2^13047890 is an apocalyptic number.

13047890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13047890 is a deficient number, since it is larger than the sum of its proper divisors (10534342).

13047890 is a wasteful number, since it uses less digits than its factorization.

13047890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5341.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 13047890 is about 3612.1863185611. The cubic root of 13047890 is about 235.4218467895.

The spelling of 13047890 in words is "thirteen million, forty-seven thousand, eight hundred ninety".