7640474 has 4 divisors (see below), whose sum is σ = 11460714. Its totient is φ = 3820236.

The previous prime is 7640471. The next prime is 7640483. The reversal of 7640474 is 4740467.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 4774225 + 2866249 = 2185^2 + 1693^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7640474.

It is not an unprimeable number, because it can be changed into a prime (7640471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910117 + ... + 1910120.

Almost surely, 2^7640474 is an apocalyptic number.

7640474 is a deficient number, since it is larger than the sum of its proper divisors (3820240).

7640474 is a wasteful number, since it uses less digits than its factorization.

7640474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820239.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 7640474 is about 2764.1407344779. The cubic root of 7640474 is about 196.9579131407.

The spelling of 7640474 in words is "seven million, six hundred forty thousand, four hundred seventy-four".