38390247 has 32 divisors (see below), whose sum is σ = 65356800. Its totient is φ = 21816864.

The previous prime is 38390221. The next prime is 38390251. The reversal of 38390247 is 74209383.

It is not a de Polignac number, because 38390247 - 2⁸ = 38389991 is a prime.

It is a super-2 number, since 2×38390247² = 2947622129442018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38390447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42838 + ... + 43724.

It is an arithmetic number, because the mean of its divisors is an integer number (2042400).

Almost surely, 2^38390247 is an apocalyptic number.

38390247 is a deficient number, since it is larger than the sum of its proper divisors (26966553).

38390247 is a wasteful number, since it uses less digits than its factorization.

38390247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 38390247 is about 6195.9863621541. The cubic root of 38390247 is about 337.3445012064.

The spelling of 38390247 in words is "thirty-eight million, three hundred ninety thousand, two hundred forty-seven".