75445990 has 16 divisors (see below), whose sum is σ = 137149200. Its totient is φ = 29879200.

The previous prime is 75445969. The next prime is 75445991. The reversal of 75445990 is 9954457.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75445991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36340 + ... + 38359.

It is an arithmetic number, because the mean of its divisors is an integer number (8571825).

Almost surely, 2^75445990 is an apocalyptic number.

75445990 is a deficient number, since it is larger than the sum of its proper divisors (61703210).

75445990 is a wasteful number, since it uses less digits than its factorization.

75445990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74807.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 75445990 is about 8685.9651162090. The cubic root of 75445990 is about 422.5505979107.

The spelling of 75445990 in words is "seventy-five million, four hundred forty-five thousand, nine hundred ninety".