7621320 has 128 divisors (see below), whose sum is σ = 26864640. Its totient is φ = 1693440.

The previous prime is 7621259. The next prime is 7621399. The reversal of 7621320 is 231267.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

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, 36015 + ... + 36225.

It is an arithmetic number, because the mean of its divisors is an integer number (209880).

Almost surely, 2^7621320 is an apocalyptic number.

7621320 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 7621320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13432320).

7621320 is an abundant number, since it is smaller than the sum of its proper divisors (19243320).

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

7621320 is a wasteful number, since it uses less digits than its factorization.

7621320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 7621320 is about 2760.6738307884. The cubic root of 7621320 is about 196.7931899950.

Adding to 7621320 its reverse (231267), we get a palindrome (7852587).

The spelling of 7621320 in words is "seven million, six hundred twenty-one thousand, three hundred twenty".