1945201860 has 72 divisors (see below), whose sum is σ = 6743370816. Its totient is φ = 444617280.

The previous prime is 1945201849. The next prime is 1945201871. The reversal of 1945201860 is 681025491.

It is an interprime number because it is at equal distance from previous prime (1945201849) and next prime (1945201871).

It is a super-2 number, since 2×1945201860² = 7567620552294919200, which contains 22 as substring.

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

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 23 ways as a sum of consecutive naturals, for example, 770646 + ... + 773165.

It is an arithmetic number, because the mean of its divisors is an integer number (93657928).

Almost surely, 2^1945201860 is an apocalyptic number.

1945201860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1945201860 is an abundant number, since it is smaller than the sum of its proper divisors (4798168956).

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

1945201860 is a wasteful number, since it uses less digits than its factorization.

1945201860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543833 (or 1543828 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1945201860 is about 44104.4426333674. The cubic root of 1945201860 is about 1248.3074393585.

The spelling of 1945201860 in words is "one billion, nine hundred forty-five million, two hundred one thousand, eight hundred sixty".