2145872490 has 16 divisors (see below), whose sum is σ = 5150094048. Its totient is φ = 572232656.

The previous prime is 2145872471. The next prime is 2145872501. The reversal of 2145872490 is 942785412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35764512 + ... + 35764571.

It is an arithmetic number, because the mean of its divisors is an integer number (321880878).

Almost surely, 2^2145872490 is an apocalyptic number.

2145872490 is an abundant number, since it is smaller than the sum of its proper divisors (3004221558).

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

2145872490 is a wasteful number, since it uses less digits than its factorization.

2145872490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71529093.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 2145872490 is about 46323.5630106321. The cubic root of 2145872490 is about 1289.8364253863.

The spelling of 2145872490 in words is "two billion, one hundred forty-five million, eight hundred seventy-two thousand, four hundred ninety".