1538620494 has 32 divisors (see below), whose sum is σ = 3264737280. Its totient is φ = 482049792.

The previous prime is 1538620493. The next prime is 1538620537. The reversal of 1538620494 is 4940268351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538620493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38659 + ... + 67614.

It is an arithmetic number, because the mean of its divisors is an integer number (102023040).

Almost surely, 2^1538620494 is an apocalyptic number.

1538620494 is an abundant number, since it is smaller than the sum of its proper divisors (1726116786).

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

1538620494 is a wasteful number, since it uses less digits than its factorization.

1538620494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106424.

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 1538620494 is about 39225.2532687808. The cubic root of 1538620494 is about 1154.4554303942.

The spelling of 1538620494 in words is "one billion, five hundred thirty-eight million, six hundred twenty thousand, four hundred ninety-four".