1164042638 has 16 divisors (see below), whose sum is σ = 2005050240. Its totient is φ = 501262200.

The previous prime is 1164042617. The next prime is 1164042641. The reversal of 1164042638 is 8362404611.

It is a junction number, because it is equal to n+sod(n) for n = 1164042598 and 1164042607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1391978 + ... + 1392813.

It is an arithmetic number, because the mean of its divisors is an integer number (125315640).

Almost surely, 2^1164042638 is an apocalyptic number.

1164042638 is a deficient number, since it is larger than the sum of its proper divisors (841007602).

1164042638 is a wasteful number, since it uses less digits than its factorization.

1164042638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2784823.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 1164042638 is about 34118.0690836982. The cubic root of 1164042638 is about 1051.9367543553.

The spelling of 1164042638 in words is "one billion, one hundred sixty-four million, forty-two thousand, six hundred thirty-eight".