75645428 has 12 divisors (see below), whose sum is σ = 135458400. Its totient is φ = 36943032.

The previous prime is 75645397. The next prime is 75645431. The reversal of 75645428 is 82454657.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219728 + ... + 220071.

It is an arithmetic number, because the mean of its divisors is an integer number (11288200).

Almost surely, 2^75645428 is an apocalyptic number.

It is an amenable number.

75645428 is a deficient number, since it is larger than the sum of its proper divisors (59812972).

75645428 is a wasteful number, since it uses less digits than its factorization.

75645428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439846 (or 439844 counting only the distinct ones).

The product of its digits is 268800, while the sum is 41.

The square root of 75645428 is about 8697.4380135762. The cubic root of 75645428 is about 422.9226013269.

The spelling of 75645428 in words is "seventy-five million, six hundred forty-five thousand, four hundred twenty-eight".