38642247 has 48 divisors (see below), whose sum is σ = 66313728. Its totient is φ = 21228480.

The previous prime is 38642243. The next prime is 38642269. The reversal of 38642247 is 74224683.

38642247 is a `hidden beast` number, since 3 + 8 + 642 + 2 + 4 + 7 = 666.

It is not a de Polignac number, because 38642247 - 2² = 38642243 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38642243) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 236988 + ... + 237150.

It is an arithmetic number, because the mean of its divisors is an integer number (1381536).

Almost surely, 2^38642247 is an apocalyptic number.

38642247 is a deficient number, since it is larger than the sum of its proper divisors (27671481).

38642247 is a wasteful number, since it uses less digits than its factorization.

38642247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 297 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 38642247 is about 6216.2888446403. The cubic root of 38642247 is about 338.0810205736.

The spelling of 38642247 in words is "thirty-eight million, six hundred forty-two thousand, two hundred forty-seven".