38276721 has 24 divisors (see below), whose sum is σ = 63370944. Its totient is φ = 21808800.

The previous prime is 38276717. The next prime is 38276729. The reversal of 38276721 is 12767283.

It is not a de Polignac number, because 38276721 - 2² = 38276717 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38276729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28771 + ... + 30071.

It is an arithmetic number, because the mean of its divisors is an integer number (2640456).

Almost surely, 2^38276721 is an apocalyptic number.

It is an amenable number.

38276721 is a deficient number, since it is larger than the sum of its proper divisors (25094223).

38276721 is a wasteful number, since it uses less digits than its factorization.

38276721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781 (or 1778 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 38276721 is about 6186.8183260865. The cubic root of 38276721 is about 337.0116459682.

The spelling of 38276721 in words is "thirty-eight million, two hundred seventy-six thousand, seven hundred twenty-one".