13768820 has 24 divisors (see below), whose sum is σ = 31139304. Its totient is φ = 5083776.

The previous prime is 13768819. The next prime is 13768837. The reversal of 13768820 is 2886731.

It can be written as a sum of positive squares in 4 ways, for example, as 620944 + 13147876 = 788^2 + 3626^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26219 + ... + 26738.

It is an arithmetic number, because the mean of its divisors is an integer number (1297471).

Almost surely, 2^13768820 is an apocalyptic number.

13768820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13768820 is an abundant number, since it is smaller than the sum of its proper divisors (17370484).

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

13768820 is a wasteful number, since it uses less digits than its factorization.

13768820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52979 (or 52977 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 13768820 is about 3710.6360640731. The cubic root of 13768820 is about 239.6802454732.

The spelling of 13768820 in words is "thirteen million, seven hundred sixty-eight thousand, eight hundred twenty".