1071939638 has 64 divisors (see below), whose sum is σ = 2084438016. Its totient is φ = 401220000.

The previous prime is 1071939623. The next prime is 1071939653. The reversal of 1071939638 is 8369391701.

It is a happy number.

1071939638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1071939623) and next prime (1071939653).

It is a super-2 number, since 2×1071939638² = 2298109175031142088, which contains 22 as substring.

It is a Curzon number.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 1071939592 and 1071939601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 720131 + ... + 721617.

It is an arithmetic number, because the mean of its divisors is an integer number (32569344).

Almost surely, 2^1071939638 is an apocalyptic number.

1071939638 is a deficient number, since it is larger than the sum of its proper divisors (1012498378).

1071939638 is a wasteful number, since it uses less digits than its factorization.

1071939638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 1071939638 is about 32740.4892755133. The cubic root of 1071939638 is about 1023.4267796789.

The spelling of 1071939638 in words is "one billion, seventy-one million, nine hundred thirty-nine thousand, six hundred thirty-eight".