38724645 has 8 divisors (see below), whose sum is σ = 61959456. Its totient is φ = 20653136.

The previous prime is 38724559. The next prime is 38724659. The reversal of 38724645 is 54642783.

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 38724645 - 2¹³ = 38716453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1290807 + ... + 1290836.

It is an arithmetic number, because the mean of its divisors is an integer number (7744932).

Almost surely, 2^38724645 is an apocalyptic number.

It is an amenable number.

38724645 is a deficient number, since it is larger than the sum of its proper divisors (23234811).

38724645 is a wasteful number, since it uses less digits than its factorization.

38724645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2581651.

The product of its digits is 161280, while the sum is 39.

The square root of 38724645 is about 6222.9129031347. The cubic root of 38724645 is about 338.3211500112.

The spelling of 38724645 in words is "thirty-eight million, seven hundred twenty-four thousand, six hundred forty-five".