2138697450 has 72 divisors (see below), whose sum is σ = 5879647488. Its totient is φ = 557051040.

The previous prime is 2138697443. The next prime is 2138697469. The reversal of 2138697450 is 547968312.

2138697450 is a `hidden beast` number, since 2 + 138 + 69 + 7 + 450 = 666.

2138697450 is digitally balanced in base 10, because in such base it contains all the possibile digits an equal number of times.

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

2138697450 is strictly pandigital in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 2138697396 and 2138697405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35914 + ... + 74613.

It is a 1-persistent number, because it is pandigital, but 2⋅2138697450 = 4277394900 is not.

Almost surely, 2^2138697450 is an apocalyptic number.

2138697450 is an abundant number, since it is smaller than the sum of its proper divisors (3740950038).

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

2138697450 is a wasteful number, since it uses less digits than its factorization.

2138697450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110588 (or 110580 counting only the distinct ones).

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

The square root of 2138697450 is about 46246.0533451234. The cubic root of 2138697450 is about 1288.3972342681.

The spelling of 2138697450 in words is "two billion, one hundred thirty-eight million, six hundred ninety-seven thousand, four hundred fifty".