7978750 has 40 divisors (see below), whose sum is σ = 16138584. Its totient is φ = 2940000.

The previous prime is 7978721. The next prime is 7978753. The reversal of 7978750 is 578797.

It is a junction number, because it is equal to n+sod(n) for n = 7978697 and 7978706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978753) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 16005 + ... + 16495.

Almost surely, 2^7978750 is an apocalyptic number.

7978750 is an abundant number, since it is smaller than the sum of its proper divisors (8159834).

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

7978750 is a wasteful number, since it uses less digits than its factorization.

7978750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526 (or 511 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 43.

The square root of 7978750 is about 2824.6681220986. The cubic root of 7978750 is about 199.8227596423.

The spelling of 7978750 in words is "seven million, nine hundred seventy-eight thousand, seven hundred fifty".