1157393898 has 24 divisors (see below), whose sum is σ = 2655198468. Its totient is φ = 363103872.

The previous prime is 1157393849. The next prime is 1157393899. The reversal of 1157393898 is 8983937511.

It can be written as a sum of positive squares in 2 ways, for example, as 1153485369 + 3908529 = 33963^2 + 1977^2 .

It is not an unprimeable number, because it can be changed into a prime (1157393899) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1890861 + ... + 1891472.

Almost surely, 2^1157393898 is an apocalyptic number.

1157393898 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1157393898 is an abundant number, since it is smaller than the sum of its proper divisors (1497804570).

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

1157393898 is a wasteful number, since it uses less digits than its factorization.

1157393898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782358 (or 3782355 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 54.

The square root of 1157393898 is about 34020.4923244800. The cubic root of 1157393898 is about 1049.9301232410.

The spelling of 1157393898 in words is "one billion, one hundred fifty-seven million, three hundred ninety-three thousand, eight hundred ninety-eight".