75012780 has 48 divisors (see below), whose sum is σ = 215165664. Its totient is φ = 19514880.

The previous prime is 75012761. The next prime is 75012781. The reversal of 75012780 is 8721057.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (75012781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12787 + ... + 17706.

It is an arithmetic number, because the mean of its divisors is an integer number (4482618).

Almost surely, 2^75012780 is an apocalyptic number.

It is an amenable number.

75012780 is an abundant number, since it is smaller than the sum of its proper divisors (140152884).

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

75012780 is a wasteful number, since it uses less digits than its factorization.

75012780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30546 (or 30544 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 75012780 is about 8660.9918600585. The cubic root of 75012780 is about 421.7402847781.

It can be divided in two parts, 750 and 12780, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 75012780 in words is "seventy-five million, twelve thousand, seven hundred eighty".