38224781 has 16 divisors (see below), whose sum is σ = 45944064. Its totient is φ = 31092864.

The previous prime is 38224759. The next prime is 38224783. The reversal of 38224781 is 18742283.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38224781 is a prime.

It is a super-2 number, since 2×38224781² = 2922267764995922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38224783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21191 + ... + 22923.

It is an arithmetic number, because the mean of its divisors is an integer number (2871504).

Almost surely, 2^38224781 is an apocalyptic number.

It is an amenable number.

38224781 is a deficient number, since it is larger than the sum of its proper divisors (7719283).

38224781 is a wasteful number, since it uses less digits than its factorization.

38224781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900.

The product of its digits is 21504, while the sum is 35.

The square root of 38224781 is about 6182.6192669450. The cubic root of 38224781 is about 336.8591397974.

The spelling of 38224781 in words is "thirty-eight million, two hundred twenty-four thousand, seven hundred eighty-one".