1619989074 has 48 divisors (see below), whose sum is σ = 3832657920. Its totient is φ = 490445280.

The previous prime is 1619989057. The next prime is 1619989079. The reversal of 1619989074 is 4709899161.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1619989074.

It is not an unprimeable number, because it can be changed into a prime (1619989079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 250044 + ... + 256440.

It is an arithmetic number, because the mean of its divisors is an integer number (79847040).

Almost surely, 2^1619989074 is an apocalyptic number.

1619989074 is an abundant number, since it is smaller than the sum of its proper divisors (2212668846).

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

1619989074 is a wasteful number, since it uses less digits than its factorization.

1619989074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7695 (or 7692 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 54.

The square root of 1619989074 is about 40249.0878654411. The cubic root of 1619989074 is about 1174.4576519840.

The spelling of 1619989074 in words is "one billion, six hundred nineteen million, nine hundred eighty-nine thousand, seventy-four".