618047638 has 16 divisors (see below), whose sum is σ = 1012064256. Its totient is φ = 281344320.

The previous prime is 618047621. The next prime is 618047657. The reversal of 618047638 is 836740816.

It is a junction number, because it is equal to n+sod(n) for n = 618047594 and 618047603.

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, 160918 + ... + 164713.

It is an arithmetic number, because the mean of its divisors is an integer number (63254016).

Almost surely, 2^618047638 is an apocalyptic number.

618047638 is a deficient number, since it is larger than the sum of its proper divisors (394016618).

618047638 is a wasteful number, since it uses less digits than its factorization.

618047638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325719.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 618047638 is about 24860.5639115447. The cubic root of 618047638 is about 851.8059126841.

The spelling of 618047638 in words is "six hundred eighteen million, forty-seven thousand, six hundred thirty-eight".