1986270945 has 32 divisors (see below), whose sum is σ = 3230419968. Its totient is φ = 1041931968.

The previous prime is 1986270919. The next prime is 1986270971. The reversal of 1986270945 is 5490726891.

It is an interprime number because it is at equal distance from previous prime (1986270919) and next prime (1986270971).

It is not a de Polignac number, because 1986270945 - 2⁷ = 1986270817 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 950692 + ... + 952778.

It is an arithmetic number, because the mean of its divisors is an integer number (100950624).

Almost surely, 2^1986270945 is an apocalyptic number.

1986270945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1986270945 is a deficient number, since it is larger than the sum of its proper divisors (1244149023).

1986270945 is a wasteful number, since it uses less digits than its factorization.

1986270945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3109.

The product of its (nonzero) digits is 1088640, while the sum is 51.

The square root of 1986270945 is about 44567.5997222197. The cubic root of 1986270945 is about 1257.0315070939.

The spelling of 1986270945 in words is "one billion, nine hundred eighty-six million, two hundred seventy thousand, nine hundred forty-five".