7798440 has 64 divisors (see below), whose sum is σ = 25200000. Its totient is φ = 1919232.

The previous prime is 7798421. The next prime is 7798457. The reversal of 7798440 is 448977.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 940 + ... + 4059.

It is an arithmetic number, because the mean of its divisors is an integer number (393750).

Almost surely, 2^7798440 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 7798440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12600000).

7798440 is an abundant number, since it is smaller than the sum of its proper divisors (17401560).

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

7798440 is a wasteful number, since it uses less digits than its factorization.

7798440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5026 (or 5022 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 7798440 is about 2792.5687099873. The cubic root of 7798440 is about 198.3060261033.

The spelling of 7798440 in words is "seven million, seven hundred ninety-eight thousand, four hundred forty".