38402215 has 16 divisors (see below), whose sum is σ = 47124000. Its totient is φ = 30033792.

The previous prime is 38402213. The next prime is 38402239. The reversal of 38402215 is 51220483.

It is a cyclic number.

It is not a de Polignac number, because 38402215 - 2¹ = 38402213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38402215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38402213) 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, 102769 + ... + 103141.

It is an arithmetic number, because the mean of its divisors is an integer number (2945250).

Almost surely, 2^38402215 is an apocalyptic number.

38402215 is a deficient number, since it is larger than the sum of its proper divisors (8721785).

38402215 is a wasteful number, since it uses less digits than its factorization.

38402215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 38402215 is about 6196.9520733987. The cubic root of 38402215 is about 337.3795528132.

Adding to 38402215 its reverse (51220483), we get a palindrome (89622698).

The spelling of 38402215 in words is "thirty-eight million, four hundred two thousand, two hundred fifteen".