1953521438 has 16 divisors (see below), whose sum is σ = 3198216960. Its totient is φ = 887535000.

The previous prime is 1953521417. The next prime is 1953521443. The reversal of 1953521438 is 8341253591.

It is a junction number, because it is equal to n+sod(n) for n = 1953521395 and 1953521404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27563 + ... + 68313.

It is an arithmetic number, because the mean of its divisors is an integer number (199888560).

Almost surely, 2^1953521438 is an apocalyptic number.

1953521438 is a deficient number, since it is larger than the sum of its proper divisors (1244695522).

1953521438 is a wasteful number, since it uses less digits than its factorization.

1953521438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42943.

The product of its digits is 129600, while the sum is 41.

The square root of 1953521438 is about 44198.6587805558. The cubic root of 1953521438 is about 1250.0845677185.

The spelling of 1953521438 in words is "one billion, nine hundred fifty-three million, five hundred twenty-one thousand, four hundred thirty-eight".