75252720 has 40 divisors (see below), whose sum is σ = 233284176. Its totient is φ = 20067328.

The previous prime is 75252713. The next prime is 75252721. The reversal of 75252720 is 2725257.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (30) 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 (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75252721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156537 + ... + 157016.

Almost surely, 2^75252720 is an apocalyptic number.

It is an amenable number.

75252720 is an abundant number, since it is smaller than the sum of its proper divisors (158031456).

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

75252720 is a wasteful number, since it uses less digits than its factorization.

75252720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313569 (or 313563 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 75252720 is about 8674.8325632256. The cubic root of 75252720 is about 422.1894734013.

Adding to 75252720 its reverse (2725257), we get a palindrome (77977977).

The spelling of 75252720 in words is "seventy-five million, two hundred fifty-two thousand, seven hundred twenty".