39800381 has 8 divisors (see below), whose sum is σ = 40864824. Its totient is φ = 38740480.

The previous prime is 39800377. The next prime is 39800393. The reversal of 39800381 is 18300893.

It can be written as a sum of positive squares in 4 ways, for example, as 737881 + 39062500 = 859^2 + 6250^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39800381 - 2² = 39800377 is a prime.

It is a super-2 number, since 2×39800381² = 3168140655490322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39800081) 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, 23495 + ... + 25131.

It is an arithmetic number, because the mean of its divisors is an integer number (5108103).

Almost surely, 2^39800381 is an apocalyptic number.

It is an amenable number.

39800381 is a deficient number, since it is larger than the sum of its proper divisors (1064443).

39800381 is a wasteful number, since it uses less digits than its factorization.

39800381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2271.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 39800381 is about 6308.7543144427. The cubic root of 39800381 is about 341.4253341846.

The spelling of 39800381 in words is "thirty-nine million, eight hundred thousand, three hundred eighty-one".