1955445380 has 48 divisors (see below), whose sum is σ = 4701594240. Its totient is φ = 669220608.

The previous prime is 1955445353. The next prime is 1955445473. The reversal of 1955445380 is 835445591.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66416 + ... + 91224.

It is an arithmetic number, because the mean of its divisors is an integer number (97949880).

Almost surely, 2^1955445380 is an apocalyptic number.

1955445380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1955445380 is an abundant number, since it is smaller than the sum of its proper divisors (2746148860).

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

1955445380 is a wasteful number, since it uses less digits than its factorization.

1955445380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25388 (or 25386 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The square root of 1955445380 is about 44220.4181346129. The cubic root of 1955445380 is about 1250.4948184979.

The spelling of 1955445380 in words is "one billion, nine hundred fifty-five million, four hundred forty-five thousand, three hundred eighty".