7964229640 has 32 divisors (see below), whose sum is σ = 17922121560. Its totient is φ = 3185228800.

The previous prime is 7964229617. The next prime is 7964229641. The reversal of 7964229640 is 469224697.

It can be written as a sum of positive squares in 4 ways, for example, as 7528338756 + 435890884 = 86766^2 + 20878^2 .

It is not an unprimeable number, because it can be changed into a prime (7964229641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441600 + ... + 459280.

Almost surely, 2^7964229640 is an apocalyptic number.

It is an amenable number.

7964229640 is an abundant number, since it is smaller than the sum of its proper divisors (9957891920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7964229640 is a wasteful number, since it uses less digits than its factorization.

7964229640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28953 (or 28949 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 7964229640 is about 89242.5326848135. The cubic root of 7964229640 is about 1997.0146828245.

The spelling of 7964229640 in words is "seven billion, nine hundred sixty-four million, two hundred twenty-nine thousand, six hundred forty".