1157478736 has 10 divisors (see below), whose sum is σ = 2242615082. Its totient is φ = 578739360.

The previous prime is 1157478649. The next prime is 1157478737. The reversal of 1157478736 is 6378747511.

It can be written as a sum of positive squares in only one way, i.e., 1157360400 + 118336 = 34020^2 + 344^2 .

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 1157478736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157478737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36171195 + ... + 36171226.

Almost surely, 2^1157478736 is an apocalyptic number.

1157478736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1157478736 is a deficient number, since it is larger than the sum of its proper divisors (1085136346).

1157478736 is an equidigital number, since it uses as much as digits as its factorization.

1157478736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72342429 (or 72342423 counting only the distinct ones).

The product of its digits is 987840, while the sum is 49.

The square root of 1157478736 is about 34021.7391677733. The cubic root of 1157478736 is about 1049.9557762175.

The spelling of 1157478736 in words is "one billion, one hundred fifty-seven million, four hundred seventy-eight thousand, seven hundred thirty-six".