157643140 has 24 divisors (see below), whose sum is σ = 332481240. Its totient is φ = 62784768.

The previous prime is 157643137. The next prime is 157643177. The reversal of 157643140 is 41346751.

It can be written as a sum of positive squares in 4 ways, for example, as 12054784 + 145588356 = 3472^2 + 12066^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12255 + ... + 21574.

It is an arithmetic number, because the mean of its divisors is an integer number (13853385).

Almost surely, 2^157643140 is an apocalyptic number.

157643140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157643140 is an abundant number, since it is smaller than the sum of its proper divisors (174838100).

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

157643140 is a wasteful number, since it uses less digits than its factorization.

157643140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34071 (or 34069 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 157643140 is about 12555.6019369841. The cubic root of 157643140 is about 540.2047006283.

Adding to 157643140 its reverse (41346751), we get a palindrome (198989891).

The spelling of 157643140 in words is "one hundred fifty-seven million, six hundred forty-three thousand, one hundred forty".