7640726 has 4 divisors (see below), whose sum is σ = 11461092. Its totient is φ = 3820362.

The previous prime is 7640723. The next prime is 7640749. The reversal of 7640726 is 6270467.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 7640692 and 7640701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7640723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1910180 + ... + 1910183.

It is an arithmetic number, because the mean of its divisors is an integer number (2865273).

Almost surely, 2^7640726 is an apocalyptic number.

7640726 is a deficient number, since it is larger than the sum of its proper divisors (3820366).

7640726 is a wasteful number, since it uses less digits than its factorization.

7640726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3820365.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 7640726 is about 2764.1863178881. The cubic root of 7640726 is about 196.9600784884.

The spelling of 7640726 in words is "seven million, six hundred forty thousand, seven hundred twenty-six".