1977190340 has 24 divisors (see below), whose sum is σ = 4154402112. Its totient is φ = 790437600.

The previous prime is 1977190309. The next prime is 1977190363. The reversal of 1977190340 is 430917791.

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 7 ways as a sum of consecutive naturals, for example, 10865 + ... + 63815.

It is an arithmetic number, because the mean of its divisors is an integer number (173100088).

Almost surely, 2^1977190340 is an apocalyptic number.

1977190340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977190340 is an abundant number, since it is smaller than the sum of its proper divisors (2177211772).

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

1977190340 is a wasteful number, since it uses less digits than its factorization.

1977190340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54827 (or 54825 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 1977190340 is about 44465.6085081493. The cubic root of 1977190340 is about 1255.1129964977.

The spelling of 1977190340 in words is "one billion, nine hundred seventy-seven million, one hundred ninety thousand, three hundred forty".