1154838538 has 32 divisors (see below), whose sum is σ = 2010744576. Its totient is φ = 487202688.

The previous prime is 1154838499. The next prime is 1154838539. The reversal of 1154838538 is 8358384511.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1154838539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840420 + ... + 841792.

It is an arithmetic number, because the mean of its divisors is an integer number (62835768).

Almost surely, 2^1154838538 is an apocalyptic number.

1154838538 is a deficient number, since it is larger than the sum of its proper divisors (855906038).

1154838538 is a wasteful number, since it uses less digits than its factorization.

1154838538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2278.

The product of its digits is 460800, while the sum is 46.

The square root of 1154838538 is about 33982.9153840573. The cubic root of 1154838538 is about 1049.1568554156.

It can be divided in two parts, 11548 and 38538, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 1154838538 in words is "one billion, one hundred fifty-four million, eight hundred thirty-eight thousand, five hundred thirty-eight".