7879861436 has 24 divisors (see below), whose sum is σ = 14244363840. Its totient is φ = 3811275072.

The previous prime is 7879861421. The next prime is 7879861439. The reversal of 7879861436 is 6341689787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7879861439) 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, 128276 + ... + 179483.

It is an arithmetic number, because the mean of its divisors is an integer number (593515160).

Almost surely, 2^7879861436 is an apocalyptic number.

It is an amenable number.

7879861436 is a deficient number, since it is larger than the sum of its proper divisors (6364502404).

7879861436 is a wasteful number, since it uses less digits than its factorization.

7879861436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307973 (or 307971 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 59.

The square root of 7879861436 is about 88768.5836092928. The cubic root of 7879861436 is about 1989.9379151190.

The spelling of 7879861436 in words is "seven billion, eight hundred seventy-nine million, eight hundred sixty-one thousand, four hundred thirty-six".