13781490 has 16 divisors (see below), whose sum is σ = 33075648. Its totient is φ = 3675056.

The previous prime is 13781477. The next prime is 13781491. The reversal of 13781490 is 9418731.

13781490 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13781491) 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, 229662 + ... + 229721.

It is an arithmetic number, because the mean of its divisors is an integer number (2067228).

Almost surely, 2^13781490 is an apocalyptic number.

13781490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13781490 is an abundant number, since it is smaller than the sum of its proper divisors (19294158).

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

13781490 is a wasteful number, since it uses less digits than its factorization.

13781490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459393.

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 13781490 is about 3712.3429259701. The cubic root of 13781490 is about 239.7537404596.

The spelling of 13781490 in words is "thirteen million, seven hundred eighty-one thousand, four hundred ninety".