2139685470 has 96 divisors (see below), whose sum is σ = 6213104352. Its totient is φ = 526684032.

The previous prime is 2139685447. The next prime is 2139685477. The reversal of 2139685470 is 745869312.

2139685470 is a `hidden beast` number, since 2 + 13 + 96 + 8 + 547 + 0 = 666.

2139685470 is digitally balanced in base 4 and base 10, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

2139685470 is strictly pandigital in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139685477) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2277 + ... + 65456.

It is an arithmetic number, because the mean of its divisors is an integer number (64719837).

It is a 1-persistent number, because it is pandigital, but 2⋅2139685470 = 4279370940 is not.

Almost surely, 2^2139685470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2139685470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3106552176).

2139685470 is an abundant number, since it is smaller than the sum of its proper divisors (4073418882).

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

2139685470 is a wasteful number, since it uses less digits than its factorization.

2139685470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67768 (or 67756 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 2139685470 is about 46256.7343205289. The cubic root of 2139685470 is about 1288.5956052067.

The spelling of 2139685470 in words is "two billion, one hundred thirty-nine million, six hundred eighty-five thousand, four hundred seventy".