7978450 has 12 divisors (see below), whose sum is σ = 14840010. Its totient is φ = 3191360.

The previous prime is 7978441. The next prime is 7978459. The reversal of 7978450 is 548797.

It is an interprime number because it is at equal distance from previous prime (7978441) and next prime (7978459).

It can be written as a sum of positive squares in 3 ways, for example, as 6869641 + 1108809 = 2621^2 + 1053^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7978459) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79735 + ... + 79834.

Almost surely, 2^7978450 is an apocalyptic number.

7978450 is a deficient number, since it is larger than the sum of its proper divisors (6861560).

7978450 is a wasteful number, since it uses less digits than its factorization.

7978450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159581 (or 159576 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 7978450 is about 2824.6150180157. The cubic root of 7978450 is about 199.8202551740.

The spelling of 7978450 in words is "seven million, nine hundred seventy-eight thousand, four hundred fifty".