1200899740 has 24 divisors (see below), whose sum is σ = 2523375792. Its totient is φ = 480076800.

The previous prime is 1200899701. The next prime is 1200899783. The reversal of 1200899740 is 479980021.

It is a junction number, because it is equal to n+sod(n) for n = 1200899693 and 1200899702.

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, 18940 + ... + 52540.

It is an arithmetic number, because the mean of its divisors is an integer number (105140658).

Almost surely, 2^1200899740 is an apocalyptic number.

1200899740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200899740 is an abundant number, since it is smaller than the sum of its proper divisors (1322476052).

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

1200899740 is a wasteful number, since it uses less digits than its factorization.

1200899740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35397 (or 35395 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 1200899740 is about 34654.0003462804. Note that the first 3 decimals coincide. The cubic root of 1200899740 is about 1062.9240907272.

The spelling of 1200899740 in words is "one billion, two hundred million, eight hundred ninety-nine thousand, seven hundred forty".