2145396870 has 48 divisors (see below), whose sum is σ = 5580403920. Its totient is φ = 571862592.

The previous prime is 2145396823. The next prime is 2145396871. The reversal of 2145396870 is 786935412.

2145396870 is digitally balanced in base 10, because in such base 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).

2145396870 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 (2145396871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330597 + ... + 337023.

It is an arithmetic number, because the mean of its divisors is an integer number (116258415).

It is a 1-persistent number, because it is pandigital, but 2⋅2145396870 = 4290793740 is not.

Almost surely, 2^2145396870 is an apocalyptic number.

2145396870 is an abundant number, since it is smaller than the sum of its proper divisors (3435007050).

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

2145396870 is a wasteful number, since it uses less digits than its factorization.

2145396870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10149 (or 10146 counting only the distinct ones).

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

The square root of 2145396870 is about 46318.4290536715. The cubic root of 2145396870 is about 1289.7411234624.

The spelling of 2145396870 in words is "two billion, one hundred forty-five million, three hundred ninety-six thousand, eight hundred seventy".