1538366742 has 80 divisors (see below), whose sum is σ = 3778011072. Its totient is φ = 463996080.

The previous prime is 1538366677. The next prime is 1538366743. The reversal of 1538366742 is 2476638351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538366743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 402613 + ... + 406415.

Almost surely, 2^1538366742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1538366742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1889005536).

1538366742 is an abundant number, since it is smaller than the sum of its proper divisors (2239644330).

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

1538366742 is a wasteful number, since it uses less digits than its factorization.

1538366742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4055 (or 4046 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The square root of 1538366742 is about 39222.0185865032. The cubic root of 1538366742 is about 1154.3919619644.

The spelling of 1538366742 in words is "one billion, five hundred thirty-eight million, three hundred sixty-six thousand, seven hundred forty-two".