2145237858 has 40 divisors (see below), whose sum is σ = 4897638108. Its totient is φ = 701584416.

The previous prime is 2145237847. The next prime is 2145237859. The reversal of 2145237858 is 8587325412.

2145237858 is a `hidden beast` number, since 2 + 1 + 4 + 523 + 78 + 58 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1787006529 + 358231329 = 42273^2 + 18927^2 .

It is not an unprimeable number, because it can be changed into a prime (2145237859) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 116341 + ... + 133512.

Almost surely, 2^2145237858 is an apocalyptic number.

2145237858 is an abundant number, since it is smaller than the sum of its proper divisors (2752400250).

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

2145237858 is a wasteful number, since it uses less digits than its factorization.

2145237858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249920 (or 249911 counting only the distinct ones).

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

The square root of 2145237858 is about 46316.7125128716. The cubic root of 2145237858 is about 1289.7092584362.

The spelling of 2145237858 in words is "two billion, one hundred forty-five million, two hundred thirty-seven thousand, eight hundred fifty-eight".