13149780 has 96 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 2970240.

The previous prime is 13149757. The next prime is 13149781. The reversal of 13149780 is 8794131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13149781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54901 + ... + 55139.

It is an arithmetic number, because the mean of its divisors is an integer number (443520).

Almost surely, 2^13149780 is an apocalyptic number.

13149780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13149780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21288960).

13149780 is an abundant number, since it is smaller than the sum of its proper divisors (29428140).

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

13149780 is a wasteful number, since it uses less digits than its factorization.

13149780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 387 counting only the distinct ones).

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

The square root of 13149780 is about 3626.2625387581. The cubic root of 13149780 is about 236.0330557930.

The spelling of 13149780 in words is "thirteen million, one hundred forty-nine thousand, seven hundred eighty".