38128501 has 8 divisors (see below), whose sum is σ = 40584024. Its totient is φ = 35696640.

The previous prime is 38128499. The next prime is 38128507. The reversal of 38128501 is 10582183.

It can be written as a sum of positive squares in 4 ways, for example, as 857476 + 37271025 = 926^2 + 6105^2 .

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 38128501 - 2¹ = 38128499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38128501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38128507) 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, 2530 + ... + 9091.

It is an arithmetic number, because the mean of its divisors is an integer number (5073003).

Almost surely, 2^38128501 is an apocalyptic number.

It is an amenable number.

38128501 is a deficient number, since it is larger than the sum of its proper divisors (2455523).

38128501 is a wasteful number, since it uses less digits than its factorization.

38128501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11831.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 38128501 is about 6174.8280137993. The cubic root of 38128501 is about 336.5760767711.

It can be divided in two parts, 381 and 28501, that added together give a palindrome (28882).

The spelling of 38128501 in words is "thirty-eight million, one hundred twenty-eight thousand, five hundred one".