7938487772 has 12 divisors (see below), whose sum is σ = 13894562136. Its totient is φ = 3968612880.

The previous prime is 7938487771. The next prime is 7938487787. The reversal of 7938487772 is 2777848397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7938487771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128858 + ... + 180225.

It is an arithmetic number, because the mean of its divisors is an integer number (1157880178).

Almost surely, 2^7938487772 is an apocalyptic number.

It is an amenable number.

7938487772 is a deficient number, since it is larger than the sum of its proper divisors (5956074364).

7938487772 is a wasteful number, since it uses less digits than its factorization.

7938487772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315508 (or 315506 counting only the distinct ones).

The product of its digits is 33191424, while the sum is 62.

The square root of 7938487772 is about 89098.1917437161. The cubic root of 7938487772 is about 1994.8607865538.

The spelling of 7938487772 in words is "seven billion, nine hundred thirty-eight million, four hundred eighty-seven thousand, seven hundred seventy-two".