1999396524 has 24 divisors (see below), whose sum is σ = 4910799040. Its totient is φ = 631388304.

The previous prime is 1999396517. The next prime is 1999396541. The reversal of 1999396524 is 4256939991.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 4384414 + ... + 4384869.

Almost surely, 2^1999396524 is an apocalyptic number.

It is an amenable number.

1999396524 is an abundant number, since it is smaller than the sum of its proper divisors (2911402516).

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

1999396524 is a wasteful number, since it uses less digits than its factorization.

1999396524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8769309 (or 8769307 counting only the distinct ones).

The product of its digits is 4723920, while the sum is 57.

The square root of 1999396524 is about 44714.6119741634. The cubic root of 1999396524 is about 1259.7943151279.

The spelling of 1999396524 in words is "one billion, nine hundred ninety-nine million, three hundred ninety-six thousand, five hundred twenty-four".