1072743638 has 16 divisors (see below), whose sum is σ = 1641183120. Its totient is φ = 525703776.

The previous prime is 1072743631. The next prime is 1072743643. The reversal of 1072743638 is 8363472701.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1072743595 and 1072743604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1072743631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108581 + ... + 118047.

It is an arithmetic number, because the mean of its divisors is an integer number (102573945).

Almost surely, 2^1072743638 is an apocalyptic number.

1072743638 is a deficient number, since it is larger than the sum of its proper divisors (568439482).

1072743638 is a wasteful number, since it uses less digits than its factorization.

1072743638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10591.

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 1072743638 is about 32752.7653488984. The cubic root of 1072743638 is about 1023.6825868367.

The spelling of 1072743638 in words is "one billion, seventy-two million, seven hundred forty-three thousand, six hundred thirty-eight".