38712820 has 12 divisors (see below), whose sum is σ = 81296964. Its totient is φ = 15485120.

The previous prime is 38712809. The next prime is 38712827. The reversal of 38712820 is 2821783.

It can be written as a sum of positive squares in 2 ways, for example, as 18028516 + 20684304 = 4246^2 + 4548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38712827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 967801 + ... + 967840.

It is an arithmetic number, because the mean of its divisors is an integer number (6774747).

Almost surely, 2^38712820 is an apocalyptic number.

It is an amenable number.

38712820 is an abundant number, since it is smaller than the sum of its proper divisors (42584144).

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

38712820 is a wasteful number, since it uses less digits than its factorization.

38712820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935650 (or 1935648 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 38712820 is about 6221.9627128423. The cubic root of 38712820 is about 338.2867097997.

The spelling of 38712820 in words is "thirty-eight million, seven hundred twelve thousand, eight hundred twenty".