1206977988 has 12 divisors (see below), whose sum is σ = 2816282000. Its totient is φ = 402325992.

The previous prime is 1206977939. The next prime is 1206978007. The reversal of 1206977988 is 8897796021.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50290738 + ... + 50290761.

Almost surely, 2^1206977988 is an apocalyptic number.

It is an amenable number.

1206977988 is an abundant number, since it is smaller than the sum of its proper divisors (1609304012).

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

1206977988 is a wasteful number, since it uses less digits than its factorization.

1206977988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100581506 (or 100581504 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 57.

The square root of 1206977988 is about 34741.5887374196. The cubic root of 1206977988 is about 1064.7143724762.

The spelling of 1206977988 in words is "one billion, two hundred six million, nine hundred seventy-seven thousand, nine hundred eighty-eight".