279690120072 has 128 divisors (see below), whose sum is σ = 849820752000. Its totient is φ = 84527089920.

The previous prime is 279690120053. The next prime is 279690120079. The reversal of 279690120072 is 270021096972.

It is not an unprimeable number, because it can be changed into a prime (279690120079) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 728454 + ... + 1044042.

It is an arithmetic number, because the mean of its divisors is an integer number (6639224625).

Almost surely, 2^279690120072 is an apocalyptic number.

279690120072 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 279690120072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (424910376000).

279690120072 is an abundant number, since it is smaller than the sum of its proper divisors (570130631928).

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

279690120072 is a wasteful number, since it uses less digits than its factorization.

279690120072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315988 (or 315978 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The spelling of 279690120072 in words is "two hundred seventy-nine billion, six hundred ninety million, one hundred twenty thousand, seventy-two".