1516394394 has 24 divisors (see below), whose sum is σ = 3288059892. Its totient is φ = 505074240.

The previous prime is 1516394387. The next prime is 1516394401. The reversal of 1516394394 is 4934936151.

1516394394 is a `hidden beast` number, since 1 + 5 + 1 + 639 + 4 + 3 + 9 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1516394387) and next prime (1516394401).

It can be written as a sum of positive squares in 2 ways, for example, as 1515155625 + 1238769 = 38925^2 + 1113^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8109 + ... + 55664.

Almost surely, 2^1516394394 is an apocalyptic number.

1516394394 is an abundant number, since it is smaller than the sum of its proper divisors (1771665498).

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

1516394394 is a wasteful number, since it uses less digits than its factorization.

1516394394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65102 (or 65099 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 1516394394 is about 38940.9090032577. The cubic root of 1516394394 is about 1148.8695618709.

The spelling of 1516394394 in words is "one billion, five hundred sixteen million, three hundred ninety-four thousand, three hundred ninety-four".