1157145340 has 48 divisors (see below), whose sum is σ = 2626539552. Its totient is φ = 425684736.

The previous prime is 1157145329. The next prime is 1157145373. The reversal of 1157145340 is 435417511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63987 + ... + 80053.

It is an arithmetic number, because the mean of its divisors is an integer number (54719574).

Almost surely, 2^1157145340 is an apocalyptic number.

1157145340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1157145340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313269776).

1157145340 is an abundant number, since it is smaller than the sum of its proper divisors (1469394212).

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

1157145340 is a wasteful number, since it uses less digits than its factorization.

1157145340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16366 (or 16364 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 1157145340 is about 34016.8390653805. The cubic root of 1157145340 is about 1049.8549580456.

The spelling of 1157145340 in words is "one billion, one hundred fifty-seven million, one hundred forty-five thousand, three hundred forty".