7958478 has 32 divisors (see below), whose sum is σ = 17838720. Its totient is φ = 2345760.

The previous prime is 7958471. The next prime is 7958521. The reversal of 7958478 is 8748597.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7958471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 813 + ... + 4071.

It is an arithmetic number, because the mean of its divisors is an integer number (557460).

Almost surely, 2^7958478 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7958478, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8919360).

7958478 is an abundant number, since it is smaller than the sum of its proper divisors (9880242).

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

7958478 is a wasteful number, since it uses less digits than its factorization.

7958478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312.

The product of its digits is 564480, while the sum is 48.

The square root of 7958478 is about 2821.0774537400. The cubic root of 7958478 is about 199.6533829635.

The spelling of 7958478 in words is "seven million, nine hundred fifty-eight thousand, four hundred seventy-eight".