1977000140 has 24 divisors (see below), whose sum is σ = 4153155552. Its totient is φ = 790522880.

The previous prime is 1977000139. The next prime is 1977000149. The reversal of 1977000140 is 410007791.

It is not an unprimeable number, because it can be changed into a prime (1977000149) 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, 46985 + ... + 78495.

It is an arithmetic number, because the mean of its divisors is an integer number (173048148).

Almost surely, 2^1977000140 is an apocalyptic number.

1977000140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1977000140 is an abundant number, since it is smaller than the sum of its proper divisors (2176155412).

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

1977000140 is a wasteful number, since it uses less digits than its factorization.

1977000140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34657 (or 34655 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 1977000140 is about 44463.4697251575. The cubic root of 1977000140 is about 1255.0727491254.

The spelling of 1977000140 in words is "one billion, nine hundred seventy-seven million, one hundred forty", and thus it is an aban number.