38797221 has 16 divisors (see below), whose sum is σ = 55270400. Its totient is φ = 24135408.

The previous prime is 38797207. The next prime is 38797249. The reversal of 38797221 is 12279783.

It is a de Polignac number, because none of the positive numbers 2^k-38797221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38797221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38797261) 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, 1261 + ... + 8898.

It is an arithmetic number, because the mean of its divisors is an integer number (3454400).

Almost surely, 2^38797221 is an apocalyptic number.

It is an amenable number.

38797221 is a deficient number, since it is larger than the sum of its proper divisors (16473179).

38797221 is a wasteful number, since it uses less digits than its factorization.

38797221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10248.

The product of its digits is 42336, while the sum is 39.

The square root of 38797221 is about 6228.7415261833. The cubic root of 38797221 is about 338.5323735735.

The spelling of 38797221 in words is "thirty-eight million, seven hundred ninety-seven thousand, two hundred twenty-one".