7999530 has 64 divisors (see below), whose sum is σ = 23943168. Its totient is φ = 1661760.

The previous prime is 7999507. The next prime is 7999531. The reversal of 7999530 is 359997.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (7999531) 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, 579 + ... + 4041.

It is an arithmetic number, because the mean of its divisors is an integer number (374112).

Almost surely, 2^7999530 is an apocalyptic number.

7999530 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 7999530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11971584).

7999530 is an abundant number, since it is smaller than the sum of its proper divisors (15943638).

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

7999530 is a wasteful number, since it uses less digits than its factorization.

7999530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491.

The product of its (nonzero) digits is 76545, while the sum is 42.

The square root of 7999530 is about 2828.3440384791. The cubic root of 7999530 is about 199.9960832566.

The spelling of 7999530 in words is "seven million, nine hundred ninety-nine thousand, five hundred thirty".