157438586 has 4 divisors (see below), whose sum is σ = 236157882. Its totient is φ = 78719292.

The previous prime is 157438577. The next prime is 157438601. The reversal of 157438586 is 685834751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 111619225 + 45819361 = 10565^2 + 6769^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 157438586.

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 as a sum of consecutive naturals, namely, 39359645 + ... + 39359648.

Almost surely, 2^157438586 is an apocalyptic number.

157438586 is a deficient number, since it is larger than the sum of its proper divisors (78719296).

157438586 is an equidigital number, since it uses as much as digits as its factorization.

157438586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78719295.

The product of its digits is 806400, while the sum is 47.

The square root of 157438586 is about 12547.4533671180. The cubic root of 157438586 is about 539.9709472252.

The spelling of 157438586 in words is "one hundred fifty-seven million, four hundred thirty-eight thousand, five hundred eighty-six".