38404681 has 32 divisors (see below), whose sum is σ = 48384000. Its totient is φ = 30376080.

The previous prime is 38404669. The next prime is 38404697. The reversal of 38404681 is 18640483.

It is not a de Polignac number, because 38404681 - 2⁹ = 38404169 is a prime.

It is a super-2 number, since 2×38404681² = 2949839045423522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38404621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 462666 + ... + 462748.

It is an arithmetic number, because the mean of its divisors is an integer number (1512000).

Almost surely, 2^38404681 is an apocalyptic number.

It is an amenable number.

38404681 is a deficient number, since it is larger than the sum of its proper divisors (9979319).

38404681 is an equidigital number, since it uses as much as digits as its factorization.

38404681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 38404681 is about 6197.1510389856. The cubic root of 38404681 is about 337.3867742731.

The spelling of 38404681 in words is "thirty-eight million, four hundred four thousand, six hundred eighty-one".