7640293 has 6 divisors (see below), whose sum is σ = 8116466. Its totient is φ = 7190592.

The previous prime is 7640287. The next prime is 7640329. The reversal of 7640293 is 3920467.

It can be written as a sum of positive squares in 3 ways, for example, as 4464769 + 3175524 = 2113^2 + 1782^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7640293 is a prime.

It is a d-powerful number, because it can be written as 7⁸ + 6⁷ + 4⁵ + 0 + 2⁷ + 9² + 3¹³ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640263) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12930 + ... + 13507.

Almost surely, 2^7640293 is an apocalyptic number.

It is an amenable number.

7640293 is a deficient number, since it is larger than the sum of its proper divisors (476173).

7640293 is a wasteful number, since it uses less digits than its factorization.

7640293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26471 (or 26454 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 7640293 is about 2764.1079935487. The cubic root of 7640293 is about 196.9563578418.

The spelling of 7640293 in words is "seven million, six hundred forty thousand, two hundred ninety-three".