75316820 has 24 divisors (see below), whose sum is σ = 159621000. Its totient is φ = 29849472.

The previous prime is 75316781. The next prime is 75316831. The reversal of 75316820 is 2861357.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 32649796 + 42667024 = 5714^2 + 6532^2 .

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, 15095 + ... + 19454.

It is an arithmetic number, because the mean of its divisors is an integer number (6650875).

Almost surely, 2^75316820 is an apocalyptic number.

It is an amenable number.

75316820 is an abundant number, since it is smaller than the sum of its proper divisors (84304180).

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

75316820 is a wasteful number, since it uses less digits than its factorization.

75316820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34667 (or 34665 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 75316820 is about 8678.5263726050. The cubic root of 75316820 is about 422.3093125469.

The spelling of 75316820 in words is "seventy-five million, three hundred sixteen thousand, eight hundred twenty".