38406686 has 4 divisors (see below), whose sum is σ = 57610032. Its totient is φ = 19203342.

The previous prime is 38406677. The next prime is 38406713. The reversal of 38406686 is 68660483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 68660483 = 59 ⋅1163737.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9601670 + ... + 9601673.

It is an arithmetic number, because the mean of its divisors is an integer number (14402508).

Almost surely, 2^38406686 is an apocalyptic number.

38406686 is a deficient number, since it is larger than the sum of its proper divisors (19203346).

38406686 is a wasteful number, since it uses less digits than its factorization.

38406686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19203345.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 38406686 is about 6197.3128047566. The cubic root of 38406686 is about 337.3926455080.

The spelling of 38406686 in words is "thirty-eight million, four hundred six thousand, six hundred eighty-six".