75408389 has 8 divisors (see below), whose sum is σ = 88283328. Its totient is φ = 63059040.

The previous prime is 75408293. The next prime is 75408407. The reversal of 75408389 is 98380457.

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 75408389 - 2⁸ = 75408133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75408589) 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, 131087 + ... + 131660.

It is an arithmetic number, because the mean of its divisors is an integer number (11035416).

Almost surely, 2^75408389 is an apocalyptic number.

It is an amenable number.

75408389 is a deficient number, since it is larger than the sum of its proper divisors (12874939).

75408389 is a wasteful number, since it uses less digits than its factorization.

75408389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262795.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 75408389 is about 8683.8003777148. The cubic root of 75408389 is about 422.4803888987.

The spelling of 75408389 in words is "seventy-five million, four hundred eight thousand, three hundred eighty-nine".