38778249 has 16 divisors (see below), whose sum is σ = 54371520. Its totient is φ = 24548160.

The previous prime is 38778247. The next prime is 38778263. The reversal of 38778249 is 94287783.

It is not a de Polignac number, because 38778249 - 2¹ = 38778247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 38778198 and 38778207.

It is not an unprimeable number, because it can be changed into a prime (38778247) 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, 1654 + ... + 8960.

It is an arithmetic number, because the mean of its divisors is an integer number (3398220).

Almost surely, 2^38778249 is an apocalyptic number.

It is an amenable number.

38778249 is a deficient number, since it is larger than the sum of its proper divisors (15593271).

38778249 is a wasteful number, since it uses less digits than its factorization.

38778249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7400.

The product of its digits is 677376, while the sum is 48.

The square root of 38778249 is about 6227.2183998957. The cubic root of 38778249 is about 338.4771833373.

The spelling of 38778249 in words is "thirty-eight million, seven hundred seventy-eight thousand, two hundred forty-nine".