7099920 has 160 divisors (see below), whose sum is σ = 25891200. Its totient is φ = 1783296.

The previous prime is 7099913. The next prime is 7099927. The reversal of 7099920 is 299907.

7099920 = 225² + 226² + ... + 319².

It is an interprime number because it is at equal distance from previous prime (7099913) and next prime (7099927).

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

It is not an unprimeable number, because it can be changed into a prime (7099927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40954 + ... + 41126.

It is an arithmetic number, because the mean of its divisors is an integer number (161820).

Almost surely, 2^7099920 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 7099920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12945600).

7099920 is an abundant number, since it is smaller than the sum of its proper divisors (18791280).

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

7099920 is a wasteful number, since it uses less digits than its factorization.

7099920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 7099920 is about 2664.5675071201. The cubic root of 7099920 is about 192.1990123978.

The spelling of 7099920 in words is "seven million, ninety-nine thousand, nine hundred twenty".