1977245000 has 40 divisors (see below), whose sum is σ = 4632696750. Its totient is φ = 790896000.

The previous prime is 1977244981. The next prime is 1977245003. The reversal of 1977245000 is 5427791.

It can be written as a sum of positive squares in 5 ways, for example, as 21659716 + 1955585284 = 4654^2 + 44222^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1977245003) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 192725 + ... + 202724.

Almost surely, 2^1977245000 is an apocalyptic number.

1977245000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977245000 is an abundant number, since it is smaller than the sum of its proper divisors (2655451750).

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

1977245000 is an equidigital number, since it uses as much as digits as its factorization.

1977245000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395475 (or 395456 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 1977245000 is about 44466.2231362188. The cubic root of 1977245000 is about 1255.1245623786.

The spelling of 1977245000 in words is "one billion, nine hundred seventy-seven million, two hundred forty-five thousand".