7897478 has 8 divisors (see below), whose sum is σ = 11877840. Its totient is φ = 3938200.

The previous prime is 7897471. The next prime is 7897481. The reversal of 7897478 is 8747987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 7³ + 8⁵ + 9 + 7⁴ + 4 + 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 (7897471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4298 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (1484730).

Almost surely, 2^7897478 is an apocalyptic number.

7897478 is a deficient number, since it is larger than the sum of its proper divisors (3980362).

7897478 is a wasteful number, since it uses less digits than its factorization.

7897478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10542.

The product of its digits is 790272, while the sum is 50.

The square root of 7897478 is about 2810.2451850328. The cubic root of 7897478 is about 199.1419742229.

The spelling of 7897478 in words is "seven million, eight hundred ninety-seven thousand, four hundred seventy-eight".