38076781 has 8 divisors (see below), whose sum is σ = 38742840. Its totient is φ = 37416192.

The previous prime is 38076761. The next prime is 38076793. The reversal of 38076781 is 18767083.

It can be written as a sum of positive squares in 4 ways, for example, as 11964681 + 26112100 = 3459^2 + 5110^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38076781 is a prime.

It is a super-2 number, since 2×38076781² = 2899682502643922, 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 (38076761) 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, 14161 + ... + 16633.

It is an arithmetic number, because the mean of its divisors is an integer number (4842855).

Almost surely, 2^38076781 is an apocalyptic number.

It is an amenable number.

38076781 is a deficient number, since it is larger than the sum of its proper divisors (666059).

38076781 is a wasteful number, since it uses less digits than its factorization.

38076781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 38076781 is about 6170.6386217311. The cubic root of 38076781 is about 336.4238232848.

The spelling of 38076781 in words is "thirty-eight million, seventy-six thousand, seven hundred eighty-one".