75857644 has 12 divisors (see below), whose sum is σ = 133308000. Its totient is φ = 37769648.

The previous prime is 75857641. The next prime is 75857653. The reversal of 75857644 is 44675857.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 75857594 and 75857603.

It is not an unprimeable number, because it can be changed into a prime (75857641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38719 + ... + 40630.

It is an arithmetic number, because the mean of its divisors is an integer number (11109000).

Almost surely, 2^75857644 is an apocalyptic number.

It is an amenable number.

75857644 is a deficient number, since it is larger than the sum of its proper divisors (57450356).

75857644 is a wasteful number, since it uses less digits than its factorization.

75857644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79592 (or 79590 counting only the distinct ones).

The product of its digits is 940800, while the sum is 46.

The square root of 75857644 is about 8709.6293836190. The cubic root of 75857644 is about 423.3177216775.

The spelling of 75857644 in words is "seventy-five million, eight hundred fifty-seven thousand, six hundred forty-four".