7642478 has 4 divisors (see below), whose sum is σ = 11463720. Its totient is φ = 3821238.

The previous prime is 7642403. The next prime is 7642487. The reversal of 7642478 is 8742467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8742467 = 2137 ⋅4091.

It is a Curzon number.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910618 + ... + 1910621.

It is an arithmetic number, because the mean of its divisors is an integer number (2865930).

Almost surely, 2^7642478 is an apocalyptic number.

7642478 is a deficient number, since it is larger than the sum of its proper divisors (3821242).

7642478 is a wasteful number, since it uses less digits than its factorization.

7642478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821241.

The product of its digits is 75264, while the sum is 38.

The square root of 7642478 is about 2764.5032103436. The cubic root of 7642478 is about 196.9751314945.

The spelling of 7642478 in words is "seven million, six hundred forty-two thousand, four hundred seventy-eight".