1157859420 has 24 divisors (see below), whose sum is σ = 3242006544. Its totient is φ = 308762496.

The previous prime is 1157859413. The next prime is 1157859421. The reversal of 1157859420 is 249587511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157859421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9648769 + ... + 9648888.

It is an arithmetic number, because the mean of its divisors is an integer number (135083606).

Almost surely, 2^1157859420 is an apocalyptic number.

1157859420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1157859420 is an abundant number, since it is smaller than the sum of its proper divisors (2084147124).

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

1157859420 is a wasteful number, since it uses less digits than its factorization.

1157859420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19297669 (or 19297667 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 42.

The square root of 1157859420 is about 34027.3334247631. Note that the first 3 decimals coincide. The cubic root of 1157859420 is about 1050.0708704999.

The spelling of 1157859420 in words is "one billion, one hundred fifty-seven million, eight hundred fifty-nine thousand, four hundred twenty".