38420647 has 4 divisors (see below), whose sum is σ = 38773240. Its totient is φ = 38068056.

The previous prime is 38420593. The next prime is 38420651. The reversal of 38420647 is 74602483.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38420647 - 2¹⁵ = 38387879 is a prime.

It is a super-2 number, since 2×38420647² = 2952292231797218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38423647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176133 + ... + 176350.

It is an arithmetic number, because the mean of its divisors is an integer number (9693310).

Almost surely, 2^38420647 is an apocalyptic number.

38420647 is a deficient number, since it is larger than the sum of its proper divisors (352593).

38420647 is a wasteful number, since it uses less digits than its factorization.

38420647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352592.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 38420647 is about 6198.4390777034. The cubic root of 38420647 is about 337.4335217945.

The spelling of 38420647 in words is "thirty-eight million, four hundred twenty thousand, six hundred forty-seven".