13442780 has 48 divisors (see below), whose sum is σ = 30693600. Its totient is φ = 4915968.

The previous prime is 13442749. The next prime is 13442791. The reversal of 13442780 is 8724431.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38567 + ... + 38913.

It is an arithmetic number, because the mean of its divisors is an integer number (639450).

Almost surely, 2^13442780 is an apocalyptic number.

13442780 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 13442780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15346800).

13442780 is an abundant number, since it is smaller than the sum of its proper divisors (17250820).

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

13442780 is a wasteful number, since it uses less digits than its factorization.

13442780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 13442780 is about 3666.4396899445. The cubic root of 13442780 is about 237.7732699397.

The spelling of 13442780 in words is "thirteen million, four hundred forty-two thousand, seven hundred eighty".