7897040 has 20 divisors (see below), whose sum is σ = 18360804. Its totient is φ = 3158784.

The previous prime is 7897037. The next prime is 7897049. The reversal of 7897040 is 407987.

7897040 = T₁₂₇ + T₁₂₈ + ... + T₃₆₆.

It can be written as a sum of positive squares in 2 ways, for example, as 5513104 + 2383936 = 2348^2 + 1544^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7897049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49277 + ... + 49436.

Almost surely, 2^7897040 is an apocalyptic number.

It is an amenable number.

7897040 is an abundant number, since it is smaller than the sum of its proper divisors (10463764).

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

7897040 is a wasteful number, since it uses less digits than its factorization.

7897040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98726 (or 98720 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 7897040 is about 2810.1672548089. The cubic root of 7897040 is about 199.1382926342.

The spelling of 7897040 in words is "seven million, eight hundred ninety-seven thousand, forty".