1542493986 has 64 divisors (see below), whose sum is σ = 3549934080. Its totient is φ = 441901440.

The previous prime is 1542493951. The next prime is 1542494059. The reversal of 1542493986 is 6893942451.

1542493986 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 805366 + ... + 807278.

It is an arithmetic number, because the mean of its divisors is an integer number (55467720).

Almost surely, 2^1542493986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1542493986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1774967040).

1542493986 is an abundant number, since it is smaller than the sum of its proper divisors (2007440094).

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

1542493986 is a wasteful number, since it uses less digits than its factorization.

1542493986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2591.

The product of its digits is 1866240, while the sum is 51.

The square root of 1542493986 is about 39274.5972099015. The cubic root of 1542493986 is about 1155.4234027982.

The spelling of 1542493986 in words is "one billion, five hundred forty-two million, four hundred ninety-three thousand, nine hundred eighty-six".