742635138 has 16 divisors (see below), whose sum is σ = 1697451840. Its totient is φ = 212181456.

The previous prime is 742635137. The next prime is 742635151. The reversal of 742635138 is 831536247.

It is a junction number, because it is equal to n+sod(n) for n = 742635096 and 742635105.

It is not an unprimeable number, because it can be changed into a prime (742635137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8840853 + ... + 8840936.

It is an arithmetic number, because the mean of its divisors is an integer number (106090740).

Almost surely, 2^742635138 is an apocalyptic number.

742635138 is an abundant number, since it is smaller than the sum of its proper divisors (954816702).

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

742635138 is a wasteful number, since it uses less digits than its factorization.

742635138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17681801.

The product of its digits is 120960, while the sum is 39.

The square root of 742635138 is about 27251.3327747470. The cubic root of 742635138 is about 905.5765433844.

It can be divided in two parts, 74263 and 5138, that added together give a triangular number (79401 = T₃₉₈).

The spelling of 742635138 in words is "seven hundred forty-two million, six hundred thirty-five thousand, one hundred thirty-eight".