7440186397 has 4 divisors (see below), whose sum is σ = 8503070176. Its totient is φ = 6377302620.

The previous prime is 7440186389. The next prime is 7440186407. The reversal of 7440186397 is 7936810447.

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 7440186397 - 2³ = 7440186389 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 7440186397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7440186337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531441879 + ... + 531441892.

It is an arithmetic number, because the mean of its divisors is an integer number (2125767544).

Almost surely, 2^7440186397 is an apocalyptic number.

It is an amenable number.

7440186397 is a deficient number, since it is larger than the sum of its proper divisors (1062883779).

7440186397 is a wasteful number, since it uses less digits than its factorization.

7440186397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1062883778.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The square root of 7440186397 is about 86256.5150988608. The cubic root of 7440186397 is about 1952.2163182576.

The spelling of 7440186397 in words is "seven billion, four hundred forty million, one hundred eighty-six thousand, three hundred ninety-seven".