75905028 has 18 divisors (see below), whose sum is σ = 191871134. Its totient is φ = 25301664.

The previous prime is 75905021. The next prime is 75905041. The reversal of 75905028 is 82050957.

It can be written as a sum of positive squares in only one way, i.e., 75898944 + 6084 = 8712^2 + 78^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2108473 = 75905028 / (7 + 5 + 9 + 0 + 5 + 0 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 75904983 and 75905001.

It is not an unprimeable number, because it can be changed into a prime (75905021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1054201 + ... + 1054272.

Almost surely, 2^75905028 is an apocalyptic number.

It is an amenable number.

75905028 is an abundant number, since it is smaller than the sum of its proper divisors (115966106).

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

75905028 is a wasteful number, since it uses less digits than its factorization.

75905028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108483 (or 2108478 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 75905028 is about 8712.3491665566. The cubic root of 75905028 is about 423.4058442487.

The spelling of 75905028 in words is "seventy-five million, nine hundred five thousand, twenty-eight".