38721069 has 24 divisors (see below), whose sum is σ = 59130240. Its totient is φ = 24349248.

The previous prime is 38721049. The next prime is 38721071. The reversal of 38721069 is 96012783.

38721069 is a `hidden beast` number, since 387 + 210 + 69 = 666.

It is not a de Polignac number, because 38721069 - 2⁵ = 38721037 is a prime.

It is a super-2 number, since 2×38721069² = 2998642369005522, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38721049) 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, 62449 + ... + 63065.

It is an arithmetic number, because the mean of its divisors is an integer number (2463760).

Almost surely, 2^38721069 is an apocalyptic number.

It is an amenable number.

38721069 is a deficient number, since it is larger than the sum of its proper divisors (20409171).

38721069 is a wasteful number, since it uses less digits than its factorization.

38721069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1009 (or 1006 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 38721069 is about 6222.6255712521. The cubic root of 38721069 is about 338.3107356813.

The spelling of 38721069 in words is "thirty-eight million, seven hundred twenty-one thousand, sixty-nine".