38046781 has 4 divisors (see below), whose sum is σ = 38184412. Its totient is φ = 37909152.

The previous prime is 38046769. The next prime is 38046793. The reversal of 38046781 is 18764083.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (38046769) and next prime (38046793).

It can be written as a sum of positive squares in 2 ways, for example, as 7344100 + 30702681 = 2710^2 + 5541^2 .

It is a cyclic number.

It is not a de Polignac number, because 38046781 - 2⁷ = 38046653 is a prime.

It is a super-2 number, since 2×38046781² = 2895115088923922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38046781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38046581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68400 + ... + 68953.

It is an arithmetic number, because the mean of its divisors is an integer number (9546103).

Almost surely, 2^38046781 is an apocalyptic number.

It is an amenable number.

38046781 is a deficient number, since it is larger than the sum of its proper divisors (137631).

38046781 is a wasteful number, since it uses less digits than its factorization.

38046781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137630.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 38046781 is about 6168.2072760244. The cubic root of 38046781 is about 336.3354460094.

It can be divided in two parts, 3804 and 6781, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 38046781 in words is "thirty-eight million, forty-six thousand, seven hundred eighty-one".