2120078538 has 24 divisors (see below), whose sum is σ = 4691239488. Its totient is φ = 691656552.

The previous prime is 2120078537. The next prime is 2120078549. The reversal of 2120078538 is 8358700212.

It is not an unprimeable number, because it can be changed into a prime (2120078533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1252156 + ... + 1253847.

It is an arithmetic number, because the mean of its divisors is an integer number (195468312).

Almost surely, 2^2120078538 is an apocalyptic number.

2120078538 is an abundant number, since it is smaller than the sum of its proper divisors (2571160950).

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

2120078538 is a wasteful number, since it uses less digits than its factorization.

2120078538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2506058 (or 2506055 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 2120078538 is about 46044.3105931667. The cubic root of 2120078538 is about 1284.6475211017.

The spelling of 2120078538 in words is "two billion, one hundred twenty million, seventy-eight thousand, five hundred thirty-eight".