1157904612 has 144 divisors (see below), whose sum is σ = 3356579520. Its totient is φ = 343948032.

The previous prime is 1157904607. The next prime is 1157904613. The reversal of 1157904612 is 2164097511.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1157904613) 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 47 ways as a sum of consecutive naturals, for example, 661923 + ... + 663669.

It is an arithmetic number, because the mean of its divisors is an integer number (23309580).

Almost surely, 2^1157904612 is an apocalyptic number.

1157904612 is a gapful number since it is divisible by the number (12) 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 1157904612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1678289760).

1157904612 is an abundant number, since it is smaller than the sum of its proper divisors (2198674908).

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

1157904612 is a wasteful number, since it uses less digits than its factorization.

1157904612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815 (or 1788 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 1157904612 is about 34027.9974726695. The cubic root of 1157904612 is about 1050.0845319699.

The spelling of 1157904612 in words is "one billion, one hundred fifty-seven million, nine hundred four thousand, six hundred twelve".