75649988 has 6 divisors (see below), whose sum is σ = 132387486. Its totient is φ = 37824992.

The previous prime is 75649969. The next prime is 75649993. The reversal of 75649988 is 88994657.

It can be written as a sum of positive squares in only one way, i.e., 68690944 + 6959044 = 8288^2 + 2638^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9456245 + ... + 9456252.

It is an arithmetic number, because the mean of its divisors is an integer number (22064581).

Almost surely, 2^75649988 is an apocalyptic number.

It is an amenable number.

75649988 is a deficient number, since it is larger than the sum of its proper divisors (56737498).

75649988 is a wasteful number, since it uses less digits than its factorization.

75649988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18912501 (or 18912499 counting only the distinct ones).

The product of its digits is 4354560, while the sum is 56.

The square root of 75649988 is about 8697.7001557883. The cubic root of 75649988 is about 422.9310992554.

The spelling of 75649988 in words is "seventy-five million, six hundred forty-nine thousand, nine hundred eighty-eight".