1199499420 has 72 divisors (see below), whose sum is σ = 3906950544. Its totient is φ = 274170624.

The previous prime is 1199499419. The next prime is 1199499443. The reversal of 1199499420 is 249949911.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1199499420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 201057 + ... + 206936.

It is an arithmetic number, because the mean of its divisors is an integer number (54263202).

Almost surely, 2^1199499420 is an apocalyptic number.

1199499420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1199499420 is an abundant number, since it is smaller than the sum of its proper divisors (2707451124).

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

1199499420 is a wasteful number, since it uses less digits than its factorization.

1199499420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408019 (or 408010 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 48.

The square root of 1199499420 is about 34633.7901477733. The cubic root of 1199499420 is about 1062.5107859574.

The spelling of 1199499420 in words is "one billion, one hundred ninety-nine million, four hundred ninety-nine thousand, four hundred twenty".