2238781545 has 128 divisors (see below), whose sum is σ = 5344174080. Its totient is φ = 858781440.

The previous prime is 2238781537. The next prime is 2238781547. The reversal of 2238781545 is 5451878322.

2238781545 is a `hidden beast` number, since 2 + 2 + 38 + 78 + 1 + 545 = 666.

It is not a de Polignac number, because 2238781545 - 2³ = 2238781537 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2238781545.

It is not an unprimeable number, because it can be changed into a prime (2238781547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 126852 + ... + 143418.

It is an arithmetic number, because the mean of its divisors is an integer number (41751360).

Almost surely, 2^2238781545 is an apocalyptic number.

It is an amenable number.

2238781545 is an abundant number, since it is smaller than the sum of its proper divisors (3105392535).

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

2238781545 is a wasteful number, since it uses less digits than its factorization.

2238781545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16612 (or 16606 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 2238781545 is about 47315.7642334983. The cubic root of 2238781545 is about 1308.1892401476.

The spelling of 2238781545 in words is "two billion, two hundred thirty-eight million, seven hundred eighty-one thousand, five hundred forty-five".