38287881 has 18 divisors (see below), whose sum is σ = 55986138. Its totient is φ = 25214400.

The previous prime is 38287877. The next prime is 38287897. The reversal of 38287881 is 18878283.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 38192400 + 95481 = 6180^2 + 309^2 .

It is not a de Polignac number, because 38287881 - 2² = 38287877 is a prime.

It is a super-2 number, since 2×38287881² = 2931923662940322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (38287811) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 95281 + ... + 95681.

It is an arithmetic number, because the mean of its divisors is an integer number (3110341).

Almost surely, 2^38287881 is an apocalyptic number.

It is an amenable number.

38287881 is a deficient number, since it is larger than the sum of its proper divisors (17698257).

38287881 is a wasteful number, since it uses less digits than its factorization.

38287881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 507 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 38287881 is about 6187.7201779007. The cubic root of 38287881 is about 337.0443959391.

The spelling of 38287881 in words is "thirty-eight million, two hundred eighty-seven thousand, eight hundred eighty-one".