7381620 has 72 divisors (see below), whose sum is σ = 23377536. Its totient is φ = 1881792.

The previous prime is 7381613. The next prime is 7381639. The reversal of 7381620 is 261837.

7381620 is a `hidden beast` number, since 7 + 38 + 1 + 620 = 666.

It is a congruent number.

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, 3249 + ... + 5031.

It is an arithmetic number, because the mean of its divisors is an integer number (324688).

Almost surely, 2^7381620 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 7381620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11688768).

7381620 is an abundant number, since it is smaller than the sum of its proper divisors (15995916).

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

7381620 is a wasteful number, since it uses less digits than its factorization.

7381620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1816 counting only the distinct ones).

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

The square root of 7381620 is about 2716.9136902007. The cubic root of 7381620 is about 194.7080443620.

It can be divided in two parts, 7381 and 620, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 7381620 in words is "seven million, three hundred eighty-one thousand, six hundred twenty".