2139280836 has 96 divisors (see below), whose sum is σ = 6311208960. Its totient is φ = 547814400.

The previous prime is 2139280771. The next prime is 2139280849. The reversal of 2139280836 is 6380829312.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49300 + ... + 81908.

It is an arithmetic number, because the mean of its divisors is an integer number (65741760).

Almost surely, 2^2139280836 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 2139280836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3155604480).

2139280836 is an abundant number, since it is smaller than the sum of its proper divisors (4171928124).

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

2139280836 is a wasteful number, since it uses less digits than its factorization.

2139280836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32705 (or 32703 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 2139280836 is about 46252.3603289605. The cubic root of 2139280836 is about 1288.5143716994.

The spelling of 2139280836 in words is "two billion, one hundred thirty-nine million, two hundred eighty thousand, eight hundred thirty-six".