38850781 has 4 divisors (see below), whose sum is σ = 40104064. Its totient is φ = 37597500.

The previous prime is 38850769. The next prime is 38850787. The reversal of 38850781 is 18705883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38850781 is a prime.

It is a super-2 number, since 2×38850781² = 3018766368619922, 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 (38850787) 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, 626595 + ... + 626656.

It is an arithmetic number, because the mean of its divisors is an integer number (10026016).

Almost surely, 2^38850781 is an apocalyptic number.

38850781 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

38850781 is the 2788-th centered decagonal number.

It is an amenable number.

38850781 is a deficient number, since it is larger than the sum of its proper divisors (1253283).

38850781 is a wasteful number, since it uses less digits than its factorization.

38850781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1253282.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 38850781 is about 6233.0394672262. The cubic root of 38850781 is about 338.6880845251.

The spelling of 38850781 in words is "thirty-eight million, eight hundred fifty thousand, seven hundred eighty-one".