13720890 has 16 divisors (see below), whose sum is σ = 32930208. Its totient is φ = 3658896.

The previous prime is 13720877. The next prime is 13720891. The reversal of 13720890 is 9802731.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 457363 = 13720890 / (1 + 3 + 7 + 2 + 0 + 8 + 9 + 0).

It is not an unprimeable number, because it can be changed into a prime (13720891) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 228652 + ... + 228711.

It is an arithmetic number, because the mean of its divisors is an integer number (2058138).

Almost surely, 2^13720890 is an apocalyptic number.

13720890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13720890 is an abundant number, since it is smaller than the sum of its proper divisors (19209318).

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

13720890 is a wasteful number, since it uses less digits than its factorization.

13720890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457373.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 13720890 is about 3704.1719722497. The cubic root of 13720890 is about 239.4018088806.

The spelling of 13720890 in words is "thirteen million, seven hundred twenty thousand, eight hundred ninety".