7298640 has 160 divisors (see below), whose sum is σ = 26188800. Its totient is φ = 1866240.

The previous prime is 7298639. The next prime is 7298647. The reversal of 7298640 is 468927.

7298640 is a `hidden beast` number, since 7 + 2 + 9 + 8 + 640 = 666.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 7298595 and 7298604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7298647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66906 + ... + 67014.

It is an arithmetic number, because the mean of its divisors is an integer number (163680).

Almost surely, 2^7298640 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 7298640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13094400).

7298640 is an abundant number, since it is smaller than the sum of its proper divisors (18890160).

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

7298640 is a wasteful number, since it uses less digits than its factorization.

7298640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 150 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 7298640 is about 2701.5995262067. The cubic root of 7298640 is about 193.9756939825.

The spelling of 7298640 in words is "seven million, two hundred ninety-eight thousand, six hundred forty".