73075428 has 18 divisors (see below), whose sum is σ = 184718534. Its totient is φ = 24358464.

The previous prime is 73075427. The next prime is 73075451. The reversal of 73075428 is 82457037.

It can be written as a sum of positive squares in only one way, i.e., 41062464 + 32012964 = 6408^2 + 5658^2 .

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

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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: 2029873 = 73075428 / (7 + 3 + 0 + 7 + 5 + 4 + 2 + 8).

It is a junction number, because it is equal to n+sod(n) for n = 73075392 and 73075401.

It is not an unprimeable number, because it can be changed into a prime (73075423) 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, 1014901 + ... + 1014972.

Almost surely, 2^73075428 is an apocalyptic number.

It is an amenable number.

73075428 is an abundant number, since it is smaller than the sum of its proper divisors (111643106).

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

73075428 is a wasteful number, since it uses less digits than its factorization.

73075428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029883 (or 2029878 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 73075428 is about 8548.4166955057. The cubic root of 73075428 is about 418.0778149278.

The spelling of 73075428 in words is "seventy-three million, seventy-five thousand, four hundred twenty-eight".