157818740 has 24 divisors (see below), whose sum is σ = 332157672. Its totient is φ = 62986880.

The previous prime is 157818733. The next prime is 157818743. The reversal of 157818740 is 47818751.

157818740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 3363556 + 154455184 = 1834^2 + 12428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157818743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662 + ... + 17778.

It is an arithmetic number, because the mean of its divisors is an integer number (13839903).

Almost surely, 2^157818740 is an apocalyptic number.

157818740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

157818740 is an abundant number, since it is smaller than the sum of its proper divisors (174338932).

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

157818740 is a wasteful number, since it uses less digits than its factorization.

157818740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17587 (or 17585 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 41.

The square root of 157818740 is about 12562.5928852287. The cubic root of 157818740 is about 540.4052056961.

The spelling of 157818740 in words is "one hundred fifty-seven million, eight hundred eighteen thousand, seven hundred forty".