1118597478 has 32 divisors (see below), whose sum is σ = 2249293536. Its totient is φ = 370856448.

The previous prime is 1118597477. The next prime is 1118597497. The reversal of 1118597478 is 8747958111.

It is a self number, because there is not a number n which added to its sum of digits gives 1118597478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1118597477) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1446700 + ... + 1447472.

It is an arithmetic number, because the mean of its divisors is an integer number (70290423).

Almost surely, 2^1118597478 is an apocalyptic number.

1118597478 is an abundant number, since it is smaller than the sum of its proper divisors (1130696058).

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

1118597478 is a wasteful number, since it uses less digits than its factorization.

1118597478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768.

The product of its digits is 564480, while the sum is 51.

The square root of 1118597478 is about 33445.4403170298. The cubic root of 1118597478 is about 1038.0651519650.

The spelling of 1118597478 in words is "one billion, one hundred eighteen million, five hundred ninety-seven thousand, four hundred seventy-eight".