157718340 has 120 divisors (see below), whose sum is σ = 532898520. Its totient is φ = 38817792.

The previous prime is 157718339. The next prime is 157718389. The reversal of 157718340 is 43817751.

157718340 is a `hidden beast` number, since 1 + 577 + 1 + 83 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2566404 + 155151936 = 1602^2 + 12456^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 157718295 and 157718304.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 17316 + ... + 24804.

It is an arithmetic number, because the mean of its divisors is an integer number (4440821).

Almost surely, 2^157718340 is an apocalyptic number.

157718340 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 157718340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266449260).

157718340 is an abundant number, since it is smaller than the sum of its proper divisors (375180180).

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

157718340 is a wasteful number, since it uses less digits than its factorization.

157718340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7523 (or 7512 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 157718340 is about 12558.5962591366. The cubic root of 157718340 is about 540.2905843437.

The spelling of 157718340 in words is "one hundred fifty-seven million, seven hundred eighteen thousand, three hundred forty".