7438864620 has 144 divisors (see below), whose sum is σ = 23017448160. Its totient is φ = 1793679360.

The previous prime is 7438864619. The next prime is 7438864649. The reversal of 7438864620 is 264688347.

It is a self number, because there is not a number n which added to its sum of digits gives 7438864620.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1398526 + ... + 1403834.

It is an arithmetic number, because the mean of its divisors is an integer number (159843390).

Almost surely, 2^7438864620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7438864620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11508724080).

7438864620 is an abundant number, since it is smaller than the sum of its proper divisors (15578583540).

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

7438864620 is a wasteful number, since it uses less digits than its factorization.

7438864620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5536 (or 5523 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 48.

The square root of 7438864620 is about 86248.8528619367. The cubic root of 7438864620 is about 1952.1007052290.

The spelling of 7438864620 in words is "seven billion, four hundred thirty-eight million, eight hundred sixty-four thousand, six hundred twenty".