7642730 has 8 divisors (see below), whose sum is σ = 13756932. Its totient is φ = 3057088.

The previous prime is 7642729. The next prime is 7642781. The reversal of 7642730 is 372467.

It can be written as a sum of positive squares in 2 ways, for example, as 7546009 + 96721 = 2747^2 + 311^2 .

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

It is a super-2 number, since 2×7642730² = 116822643705800, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7642693 and 7642702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382127 + ... + 382146.

Almost surely, 2^7642730 is an apocalyptic number.

7642730 is a deficient number, since it is larger than the sum of its proper divisors (6114202).

7642730 is a wasteful number, since it uses less digits than its factorization.

7642730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764280.

The product of its (nonzero) digits is 7056, while the sum is 29.

The square root of 7642730 is about 2764.5487877771. The cubic root of 7642730 is about 196.9772964637.

The spelling of 7642730 in words is "seven million, six hundred forty-two thousand, seven hundred thirty".