7890240 has 56 divisors (see below), whose sum is σ = 25054560. Its totient is φ = 2103808.

The previous prime is 7890217. The next prime is 7890251. The reversal of 7890240 is 420987.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7890198 and 7890207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3150 + ... + 5069.

Almost surely, 2^7890240 is an apocalyptic number.

It is an amenable number.

7890240 is an abundant number, since it is smaller than the sum of its proper divisors (17164320).

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

7890240 is a wasteful number, since it uses less digits than its factorization.

7890240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8239 (or 8229 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 7890240 is about 2808.9571018440. The cubic root of 7890240 is about 199.0811180788.

The spelling of 7890240 in words is "seven million, eight hundred ninety thousand, two hundred forty".