38728501 has 4 divisors (see below), whose sum is σ = 44261152. Its totient is φ = 33195852.

The previous prime is 38728493. The next prime is 38728507. The reversal of 38728501 is 10582783.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38728501 - 2³ = 38728493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38728507) 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, 2766315 + ... + 2766328.

It is an arithmetic number, because the mean of its divisors is an integer number (11065288).

Almost surely, 2^38728501 is an apocalyptic number.

It is an amenable number.

38728501 is a deficient number, since it is larger than the sum of its proper divisors (5532651).

38728501 is an equidigital number, since it uses as much as digits as its factorization.

38728501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5532650.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 38728501 is about 6223.2227181742. Note that the first 3 decimals coincide. The cubic root of 38728501 is about 338.3323790623.

The spelling of 38728501 in words is "thirty-eight million, seven hundred twenty-eight thousand, five hundred one".