7438887865 has 16 divisors (see below), whose sum is σ = 9040848768. Its totient is φ = 5875094016.

The previous prime is 7438887839. The next prime is 7438887877. The reversal of 7438887865 is 5687888347.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7438887865 - 2²³ = 7430499257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7438887797 and 7438887806.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 634537 + ... + 646153.

It is an arithmetic number, because the mean of its divisors is an integer number (565053048).

Almost surely, 2^7438887865 is an apocalyptic number.

It is an amenable number.

7438887865 is a deficient number, since it is larger than the sum of its proper divisors (1601960903).

7438887865 is a wasteful number, since it uses less digits than its factorization.

7438887865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13248.

The product of its digits is 72253440, while the sum is 64.

The square root of 7438887865 is about 86248.9876172468. The cubic root of 7438887865 is about 1952.1027385381.

The spelling of 7438887865 in words is "seven billion, four hundred thirty-eight million, eight hundred eighty-seven thousand, eight hundred sixty-five".