7275780 has 72 divisors (see below), whose sum is σ = 22381632. Its totient is φ = 1912896.

The previous prime is 7275773. The next prime is 7275809. The reversal of 7275780 is 875727.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14697 + ... + 15183.

It is an arithmetic number, because the mean of its divisors is an integer number (310856).

Almost surely, 2^7275780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7275780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11190816).

7275780 is an abundant number, since it is smaller than the sum of its proper divisors (15105852).

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

7275780 is a wasteful number, since it uses less digits than its factorization.

7275780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The square root of 7275780 is about 2697.3653812563. The cubic root of 7275780 is about 193.7729657134.

The spelling of 7275780 in words is "seven million, two hundred seventy-five thousand, seven hundred eighty".