1977252020 has 24 divisors (see below), whose sum is σ = 4210714368. Its totient is φ = 779760800.

The previous prime is 1977251989. The next prime is 1977252029. The reversal of 1977252020 is 202527791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1977252029) 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, 694796 + ... + 697635.

It is an arithmetic number, because the mean of its divisors is an integer number (175446432).

Almost surely, 2^1977252020 is an apocalyptic number.

1977252020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977252020 is an abundant number, since it is smaller than the sum of its proper divisors (2233462348).

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

1977252020 is a wasteful number, since it uses less digits than its factorization.

1977252020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392511 (or 1392509 counting only the distinct ones).

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

The square root of 1977252020 is about 44466.3020724683. The cubic root of 1977252020 is about 1255.1260477727.

The spelling of 1977252020 in words is "one billion, nine hundred seventy-seven million, two hundred fifty-two thousand, twenty".