75720220 has 12 divisors (see below), whose sum is σ = 159012504. Its totient is φ = 30288080.

The previous prime is 75720217. The next prime is 75720223. The reversal of 75720220 is 2202757.

It is an interprime number because it is at equal distance from previous prime (75720217) and next prime (75720223).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75720223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1892986 + ... + 1893025.

It is an arithmetic number, because the mean of its divisors is an integer number (13251042).

Almost surely, 2^75720220 is an apocalyptic number.

It is an amenable number.

75720220 is an abundant number, since it is smaller than the sum of its proper divisors (83292284).

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

75720220 is a wasteful number, since it uses less digits than its factorization.

75720220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3786020 (or 3786018 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 75720220 is about 8701.7366082869. The cubic root of 75720220 is about 423.0619391515.

Adding to 75720220 its reverse (2202757), we get a palindrome (77922977).

The spelling of 75720220 in words is "seventy-five million, seven hundred twenty thousand, two hundred twenty".