75131280 has 160 divisors (see below), whose sum is σ = 295814400. Its totient is φ = 17169408.

The previous prime is 75131267. The next prime is 75131293. The reversal of 75131280 is 8213157.

It is an interprime number because it is at equal distance from previous prime (75131267) and next prime (75131293).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12636 + ... + 17604.

It is an arithmetic number, because the mean of its divisors is an integer number (1848840).

Almost surely, 2^75131280 is an apocalyptic number.

75131280 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75131280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147907200).

75131280 is an abundant number, since it is smaller than the sum of its proper divisors (220683120).

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

75131280 is a wasteful number, since it uses less digits than its factorization.

75131280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4998 (or 4986 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 75131280 is about 8667.8301783088. The cubic root of 75131280 is about 421.9622466469.

The spelling of 75131280 in words is "seventy-five million, one hundred thirty-one thousand, two hundred eighty".