7925478 has 48 divisors (see below), whose sum is σ = 18156096. Its totient is φ = 2287120.

The previous prime is 7925471. The next prime is 7925503. The reversal of 7925478 is 8745297.

It is a d-powerful number, because it can be written as 7³ + 9⁵ + 2⁵ + 5 + 4⁶ + 7⁸ + 8⁷ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7925471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34801 + ... + 35027.

It is an arithmetic number, because the mean of its divisors is an integer number (378252).

Almost surely, 2^7925478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7925478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9078048).

7925478 is an abundant number, since it is smaller than the sum of its proper divisors (10230618).

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

7925478 is a wasteful number, since it uses less digits than its factorization.

7925478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289 (or 266 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 7925478 is about 2815.2225489293. Note that the first 3 decimals coincide. The cubic root of 7925478 is about 199.3770449832.

The spelling of 7925478 in words is "seven million, nine hundred twenty-five thousand, four hundred seventy-eight".