1945015380 has 144 divisors (see below), whose sum is σ = 7355746944. Its totient is φ = 404156160.

The previous prime is 1945015379. The next prime is 1945015411. The reversal of 1945015380 is 835105491.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 56307 + ... + 84026.

It is an arithmetic number, because the mean of its divisors is an integer number (51081576).

Almost surely, 2^1945015380 is an apocalyptic number.

1945015380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1945015380 is an abundant number, since it is smaller than the sum of its proper divisors (5410731564).

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

1945015380 is a wasteful number, since it uses less digits than its factorization.

1945015380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140366 (or 140361 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1945015380 is about 44102.3285099551. The cubic root of 1945015380 is about 1248.2675477299.

The spelling of 1945015380 in words is "one billion, nine hundred forty-five million, fifteen thousand, three hundred eighty".