75029780 has 36 divisors (see below), whose sum is σ = 183289428. Its totient is φ = 25724160.

The previous prime is 75029777. The next prime is 75029783. The reversal of 75029780 is 8792057.

It is an interprime number because it is at equal distance from previous prime (75029777) and next prime (75029783).

It can be written as a sum of positive squares in 2 ways, for example, as 32467204 + 42562576 = 5698^2 + 6524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75029783) 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 11 ways as a sum of consecutive naturals, for example, 37301 + ... + 39260.

It is an arithmetic number, because the mean of its divisors is an integer number (5091373).

Almost surely, 2^75029780 is an apocalyptic number.

75029780 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

75029780 is an abundant number, since it is smaller than the sum of its proper divisors (108259648).

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

75029780 is a wasteful number, since it uses less digits than its factorization.

75029780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76584 (or 76575 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 75029780 is about 8661.9732163059. The cubic root of 75029780 is about 421.7721417644.

The spelling of 75029780 in words is "seventy-five million, twenty-nine thousand, seven hundred eighty".