75540020 has 24 divisors (see below), whose sum is σ = 159705000. Its totient is φ = 30012032.

The previous prime is 75539987. The next prime is 75540053. The reversal of 75540020 is 2004557.

It is an interprime number because it is at equal distance from previous prime (75539987) and next prime (75540053).

It can be written as a sum of positive squares in 4 ways, for example, as 128164 + 75411856 = 358^2 + 8684^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9695 + ... + 15654.

It is an arithmetic number, because the mean of its divisors is an integer number (6654375).

Almost surely, 2^75540020 is an apocalyptic number.

It is an amenable number.

75540020 is an abundant number, since it is smaller than the sum of its proper divisors (84164980).

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

75540020 is a wasteful number, since it uses less digits than its factorization.

75540020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25507 (or 25505 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 75540020 is about 8691.3761856222. The cubic root of 75540020 is about 422.7260697401.

Adding to 75540020 its reverse (2004557), we get a palindrome (77544577).

The spelling of 75540020 in words is "seventy-five million, five hundred forty thousand, twenty".