1199479740 has 24 divisors (see below), whose sum is σ = 3358543440. Its totient is φ = 319861248.

The previous prime is 1199479667. The next prime is 1199479741. The reversal of 1199479740 is 479749911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199479741) 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, 9995605 + ... + 9995724.

It is an arithmetic number, because the mean of its divisors is an integer number (139939310).

Almost surely, 2^1199479740 is an apocalyptic number.

1199479740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1199479740 is an abundant number, since it is smaller than the sum of its proper divisors (2159063700).

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

1199479740 is a wasteful number, since it uses less digits than its factorization.

1199479740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19991341 (or 19991339 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 1199479740 is about 34633.5060310099. The cubic root of 1199479740 is about 1062.5049751093.

The spelling of 1199479740 in words is "one billion, one hundred ninety-nine million, four hundred seventy-nine thousand, seven hundred forty".