7645389 has 8 divisors (see below), whose sum is σ = 10253472. Its totient is φ = 5067120.

The previous prime is 7645387. The next prime is 7645403. The reversal of 7645389 is 9835467.

It is a happy number.

7645389 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7645389 - 2¹ = 7645387 is a prime.

It is a super-2 number, since 2×7645389² = 116903945922642, which contains 22 as substring.

7645389 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 7645389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7645387) 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, 6847 + ... + 7884.

It is an arithmetic number, because the mean of its divisors is an integer number (1281684).

Almost surely, 2^7645389 is an apocalyptic number.

It is an amenable number.

7645389 is a deficient number, since it is larger than the sum of its proper divisors (2608083).

7645389 is a wasteful number, since it uses less digits than its factorization.

7645389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14907.

The product of its digits is 181440, while the sum is 42.

The square root of 7645389 is about 2765.0296562605. The cubic root of 7645389 is about 197.0001374251. Note that the first 3 decimals are identical.

The spelling of 7645389 in words is "seven million, six hundred forty-five thousand, three hundred eighty-nine".