1157391490 has 8 divisors (see below), whose sum is σ = 2083304700. Its totient is φ = 462956592.

The previous prime is 1157391461. The next prime is 1157391527. The reversal of 1157391490 is 941937511.

It can be written as a sum of positive squares in 2 ways, for example, as 1154436529 + 2954961 = 33977^2 + 1719^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1157391490² = 2679110122248840200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57869565 + ... + 57869584.

Almost surely, 2^1157391490 is an apocalyptic number.

1157391490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1157391490 is a deficient number, since it is larger than the sum of its proper divisors (925913210).

1157391490 is a wasteful number, since it uses less digits than its factorization.

1157391490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115739156.

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 1157391490 is about 34020.4569340272. The cubic root of 1157391490 is about 1049.9293951013.

The spelling of 1157391490 in words is "one billion, one hundred fifty-seven million, three hundred ninety-one thousand, four hundred ninety".