1200999988 has 24 divisors (see below), whose sum is σ = 2139782400. Its totient is φ = 589656768.

The previous prime is 1200999967. The next prime is 1201000007. The reversal of 1200999988 is 8899990021.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256573 + ... + 261211.

It is an arithmetic number, because the mean of its divisors is an integer number (89157600).

Almost surely, 2^1200999988 is an apocalyptic number.

It is an amenable number.

1200999988 is a deficient number, since it is larger than the sum of its proper divisors (938782412).

1200999988 is a wasteful number, since it uses less digits than its factorization.

1200999988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799 (or 5797 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 55.

The square root of 1200999988 is about 34655.4467291940. The cubic root of 1200999988 is about 1062.9536666209.

The spelling of 1200999988 in words is "one billion, two hundred million, nine hundred ninety-nine thousand, nine hundred eighty-eight".