1955288638 has 8 divisors (see below), whose sum is σ = 2933815680. Its totient is φ = 977350080.

The previous prime is 1955288633. The next prime is 1955288641. The reversal of 1955288638 is 8368825591.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955288633) 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, 138718 + ... + 152161.

It is an arithmetic number, because the mean of its divisors is an integer number (366726960).

Almost surely, 2^1955288638 is an apocalyptic number.

1955288638 is a deficient number, since it is larger than the sum of its proper divisors (978527042).

1955288638 is a wasteful number, since it uses less digits than its factorization.

1955288638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294242.

The product of its digits is 4147200, while the sum is 55.

The square root of 1955288638 is about 44218.6458182518. The cubic root of 1955288638 is about 1250.4614057695.

The spelling of 1955288638 in words is "one billion, nine hundred fifty-five million, two hundred eighty-eight thousand, six hundred thirty-eight".