2145389670 has 24 divisors (see below), whose sum is σ = 5578013376. Its totient is φ = 572103888.

The previous prime is 2145389663. The next prime is 2145389671. The reversal of 2145389670 is 769835412.

2145389670 is a `hidden beast` number, since 21 + 4 + 538 + 96 + 7 + 0 = 666.

2145389670 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2145389670² = 9205393672285417800, which contains 22 as substring.

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

2145389670 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 (2145389671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11918742 + ... + 11918921.

It is an arithmetic number, because the mean of its divisors is an integer number (232417224).

It is a 1-persistent number, because it is pandigital, but 2⋅2145389670 = 4290779340 is not.

Almost surely, 2^2145389670 is an apocalyptic number.

2145389670 is an abundant number, since it is smaller than the sum of its proper divisors (3432623706).

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

2145389670 is a wasteful number, since it uses less digits than its factorization.

2145389670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23837676 (or 23837673 counting only the distinct ones).

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

The square root of 2145389670 is about 46318.3513307631. The cubic root of 2145389670 is about 1289.7396806607.

The spelling of 2145389670 in words is "two billion, one hundred forty-five million, three hundred eighty-nine thousand, six hundred seventy".