38902643 has 8 divisors (see below), whose sum is σ = 41948928. Its totient is φ = 35864064.

The previous prime is 38902639. The next prime is 38902663. The reversal of 38902643 is 34620983.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38902643 - 2² = 38902639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38902663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12755 + ... + 15507.

It is an arithmetic number, because the mean of its divisors is an integer number (5243616).

Almost surely, 2^38902643 is an apocalyptic number.

38902643 is a deficient number, since it is larger than the sum of its proper divisors (3046285).

38902643 is a wasteful number, since it uses less digits than its factorization.

38902643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3853.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 38902643 is about 6237.1983293783. The cubic root of 38902643 is about 338.8387226925.

The spelling of 38902643 in words is "thirty-eight million, nine hundred two thousand, six hundred forty-three".