38751913 has 8 divisors (see below), whose sum is σ = 39926600. Its totient is φ = 37584000.

The previous prime is 38751893. The next prime is 38751931. The reversal of 38751913 is 31915783.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 18429849 + 20322064 = 4293^2 + 4508^2 .

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 38751913 - 2²⁵ = 5197481 is a prime.

It is a super-2 number, since 2×38751913² = 3003421522319138, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38751413) 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, 11413 + ... + 14413.

It is an arithmetic number, because the mean of its divisors is an integer number (4990825).

Almost surely, 2^38751913 is an apocalyptic number.

It is an amenable number.

38751913 is a deficient number, since it is larger than the sum of its proper divisors (1174687).

38751913 is a wasteful number, since it uses less digits than its factorization.

38751913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387.

The product of its digits is 22680, while the sum is 37.

The square root of 38751913 is about 6225.1034529556. The cubic root of 38751913 is about 338.4005411123.

The spelling of 38751913 in words is "thirty-eight million, seven hundred fifty-one thousand, nine hundred thirteen".