2138789450 has 24 divisors (see below), whose sum is σ = 4546456032. Its totient is φ = 733299120.

The previous prime is 2138789449. The next prime is 2138789453. The reversal of 2138789450 is 549878312.

It is a happy number.

It is a super-2 number, since 2×2138789450² = 9148840622862605000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2138789395 and 2138789404.

It is not an unprimeable number, because it can be changed into a prime (2138789453) 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, 3055064 + ... + 3055763.

It is an arithmetic number, because the mean of its divisors is an integer number (189435668).

Almost surely, 2^2138789450 is an apocalyptic number.

2138789450 is an abundant number, since it is smaller than the sum of its proper divisors (2407666582).

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

2138789450 is a wasteful number, since it uses less digits than its factorization.

2138789450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6110846 (or 6110841 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 2138789450 is about 46247.0480139003. The cubic root of 2138789450 is about 1288.4157082613.

The spelling of 2138789450 in words is "two billion, one hundred thirty-eight million, seven hundred eighty-nine thousand, four hundred fifty".