1977730536 has 16 divisors (see below), whose sum is σ = 4944326400. Its totient is φ = 659243504.

The previous prime is 1977730511. The next prime is 1977730537. The reversal of 1977730536 is 6350377791.

It is a super-2 number, since 2×1977730536² = 7822836146053694592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1977730537) 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 3 ways as a sum of consecutive naturals, for example, 41202696 + ... + 41202743.

It is an arithmetic number, because the mean of its divisors is an integer number (309020400).

Almost surely, 2^1977730536 is an apocalyptic number.

It is an amenable number.

1977730536 is an abundant number, since it is smaller than the sum of its proper divisors (2966595864).

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

1977730536 is a wasteful number, since it uses less digits than its factorization.

1977730536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82405448 (or 82405444 counting only the distinct ones).

The product of its (nonzero) digits is 833490, while the sum is 48.

The square root of 1977730536 is about 44471.6824057737. The cubic root of 1977730536 is about 1255.2272908862.

The spelling of 1977730536 in words is "one billion, nine hundred seventy-seven million, seven hundred thirty thousand, five hundred thirty-six".