75438920 has 64 divisors (see below), whose sum is σ = 174493440. Its totient is φ = 29344000.

The previous prime is 75438907. The next prime is 75438929. The reversal of 75438920 is 2983457.

It is not an unprimeable number, because it can be changed into a prime (75438929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286709 + ... + 286971.

It is an arithmetic number, because the mean of its divisors is an integer number (2726460).

Almost surely, 2^75438920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75438920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87246720).

75438920 is an abundant number, since it is smaller than the sum of its proper divisors (99054520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75438920 is a wasteful number, since it uses less digits than its factorization.

75438920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446 (or 442 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 75438920 is about 8685.5581282955. The cubic root of 75438920 is about 422.5373985078.

The spelling of 75438920 in words is "seventy-five million, four hundred thirty-eight thousand, nine hundred twenty".