1545857140 has 48 divisors (see below), whose sum is σ = 3402217728. Its totient is φ = 588879104.

The previous prime is 1545857113. The next prime is 1545857143. The reversal of 1545857140 is 417585451.

It is a junction number, because it is equal to n+sod(n) for n = 1545857093 and 1545857102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1545857143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99969 + ... + 114391.

It is an arithmetic number, because the mean of its divisors is an integer number (70879536).

Almost surely, 2^1545857140 is an apocalyptic number.

1545857140 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 1545857140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1701108864).

1545857140 is an abundant number, since it is smaller than the sum of its proper divisors (1856360588).

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

1545857140 is a wasteful number, since it uses less digits than its factorization.

1545857140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14688 (or 14686 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 1545857140 is about 39317.3897912870. The cubic root of 1545857140 is about 1156.2625300225.

The spelling of 1545857140 in words is "one billion, five hundred forty-five million, eight hundred fifty-seven thousand, one hundred forty".