1969450138 has 8 divisors (see below), whose sum is σ = 3022877088. Its totient is φ = 961824444.

The previous prime is 1969450123. The next prime is 1969450139. The reversal of 1969450138 is 8310549691.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1969450139) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11450206 + ... + 11450377.

It is an arithmetic number, because the mean of its divisors is an integer number (377859636).

Almost surely, 2^1969450138 is an apocalyptic number.

1969450138 is a deficient number, since it is larger than the sum of its proper divisors (1053426950).

1969450138 is a wasteful number, since it uses less digits than its factorization.

1969450138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22900628.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 1969450138 is about 44378.4873333916. The cubic root of 1969450138 is about 1253.4730375777.

The spelling of 1969450138 in words is "one billion, nine hundred sixty-nine million, four hundred fifty thousand, one hundred thirty-eight".