1945020080 has 40 divisors (see below), whose sum is σ = 4528919952. Its totient is φ = 776847104.

The previous prime is 1945020067. The next prime is 1945020083. The reversal of 1945020080 is 800205491.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1945020080² = 7566206223206412800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1945020083) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36842 + ... + 72438.

Almost surely, 2^1945020080 is an apocalyptic number.

1945020080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1945020080 is an abundant number, since it is smaller than the sum of its proper divisors (2583899872).

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

1945020080 is a wasteful number, since it uses less digits than its factorization.

1945020080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36293 (or 36287 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 1945020080 is about 44102.3817950913. The cubic root of 1945020080 is about 1248.2685531809.

The spelling of 1945020080 in words is "one billion, nine hundred forty-five million, twenty thousand, eighty".