75120644 has 12 divisors (see below), whose sum is σ = 133045584. Its totient is φ = 37107624.

The previous prime is 75120641. The next prime is 75120649. The reversal of 75120644 is 44602157.

It is a super-2 number, since 2×75120644² = 11286222309949472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75120641) 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, 112802 + ... + 113465.

It is an arithmetic number, because the mean of its divisors is an integer number (11087132).

Almost surely, 2^75120644 is an apocalyptic number.

It is an amenable number.

75120644 is a deficient number, since it is larger than the sum of its proper divisors (57924940).

75120644 is a wasteful number, since it uses less digits than its factorization.

75120644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226354 (or 226352 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 75120644 is about 8667.2166235765. The cubic root of 75120644 is about 421.9423339365.

The spelling of 75120644 in words is "seventy-five million, one hundred twenty thousand, six hundred forty-four".