7621380 has 72 divisors (see below), whose sum is σ = 24904152. Its totient is φ = 1875456.

The previous prime is 7621259. The next prime is 7621399. The reversal of 7621380 is 831267.

7621380 is a `hidden beast` number, since 7 + 621 + 38 + 0 = 666.

7621380 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 777924 + 6843456 = 882^2 + 2616^2 .

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, 712 + ... + 3968.

It is an arithmetic number, because the mean of its divisors is an integer number (345891).

Almost surely, 2^7621380 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 7621380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12452076).

7621380 is an abundant number, since it is smaller than the sum of its proper divisors (17282772).

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

7621380 is a wasteful number, since it uses less digits than its factorization.

7621380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285 (or 3280 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 7621380 is about 2760.6846976792. The cubic root of 7621380 is about 196.7937064218.

It can be divided in two parts, 7621 and 380, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 7621380 in words is "seven million, six hundred twenty-one thousand, three hundred eighty".