157493290 has 8 divisors (see below), whose sum is σ = 283487940. Its totient is φ = 62997312.

The previous prime is 157493267. The next prime is 157493291. The reversal of 157493290 is 92394751.

It can be written as a sum of positive squares in 2 ways, for example, as 137053849 + 20439441 = 11707^2 + 4521^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (157493291) 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 3 ways as a sum of consecutive naturals, for example, 7874655 + ... + 7874674.

Almost surely, 2^157493290 is an apocalyptic number.

157493290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

157493290 is a deficient number, since it is larger than the sum of its proper divisors (125994650).

157493290 is a wasteful number, since it uses less digits than its factorization.

157493290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15749336.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 157493290 is about 12549.6330623648. The cubic root of 157493290 is about 540.0334798629.

It can be divided in two parts, 1574 and 93290, that added together give a square (94864 = 308²).

The spelling of 157493290 in words is "one hundred fifty-seven million, four hundred ninety-three thousand, two hundred ninety".