7900000 has 72 divisors (see below), whose sum is σ = 19686240. Its totient is φ = 3120000.

The previous prime is 7899989. The next prime is 7900001. The reversal of 7900000 is 97.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7900001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99961 + ... + 100039.

It is an arithmetic number, because the mean of its divisors is an integer number (273420).

Almost surely, 2^7900000 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 7900000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9843120).

7900000 is an abundant number, since it is smaller than the sum of its proper divisors (11786240).

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

7900000 is an frugal number, since it uses more digits than its factorization.

7900000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 63, while the sum is 16.

The square root of 7900000 is about 2810.6938645110. The cubic root of 7900000 is about 199.1631701290.

Adding to 7900000 its reverse (97), we get a palindrome (7900097).

The spelling of 7900000 in words is "seven million, nine hundred thousand".