38491345 has 4 divisors (see below), whose sum is σ = 46189620. Its totient is φ = 30793072.

The previous prime is 38491339. The next prime is 38491357. The reversal of 38491345 is 54319483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54319483 = 773 ⋅70271.

It can be written as a sum of positive squares in 2 ways, for example, as 19820304 + 18671041 = 4452^2 + 4321^2 .

It is a cyclic number.

It is not a de Polignac number, because 38491345 - 2¹³ = 38483153 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3849130 + ... + 3849139.

It is an arithmetic number, because the mean of its divisors is an integer number (11547405).

Almost surely, 2^38491345 is an apocalyptic number.

It is an amenable number.

38491345 is a deficient number, since it is larger than the sum of its proper divisors (7698275).

38491345 is an equidigital number, since it uses as much as digits as its factorization.

38491345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7698274.

The product of its digits is 51840, while the sum is 37.

The square root of 38491345 is about 6204.1393440186. The cubic root of 38491345 is about 337.6403659394.

The spelling of 38491345 in words is "thirty-eight million, four hundred ninety-one thousand, three hundred forty-five".