7891340 has 24 divisors (see below), whose sum is σ = 16653840. Its totient is φ = 3140928.

The previous prime is 7891313. The next prime is 7891361. The reversal of 7891340 is 431987.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7891297 and 7891306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3719 + ... + 5441.

It is an arithmetic number, because the mean of its divisors is an integer number (693910).

Almost surely, 2^7891340 is an apocalyptic number.

It is an amenable number.

7891340 is an abundant number, since it is smaller than the sum of its proper divisors (8762500).

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

7891340 is a wasteful number, since it uses less digits than its factorization.

7891340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961 (or 1959 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 7891340 is about 2809.1528972272. The cubic root of 7891340 is about 199.0903691305.

The spelling of 7891340 in words is "seven million, eight hundred ninety-one thousand, three hundred forty".