7797240 has 144 divisors (see below), whose sum is σ = 28009800. Its totient is φ = 1879680.

The previous prime is 7797227. The next prime is 7797241. The reversal of 7797240 is 427977.

7797240 = T₆₄ + T₆₅ + ... + T₃₆₀.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7797195 and 7797204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7797241) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43471 + ... + 43649.

Almost surely, 2^7797240 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 7797240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14004900).

7797240 is an abundant number, since it is smaller than the sum of its proper divisors (20212560).

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

7797240 is a wasteful number, since it uses less digits than its factorization.

7797240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 7797240 is about 2792.3538457724. The cubic root of 7797240 is about 198.2958540075.

The spelling of 7797240 in words is "seven million, seven hundred ninety-seven thousand, two hundred forty".