157304405 has 18 divisors (see below), whose sum is σ = 193915638. Its totient is φ = 122500560.

The previous prime is 157304393. The next prime is 157304431. The reversal of 157304405 is 504403751.

It can be written as a sum of positive squares in only one way, i.e., 125843524 + 31460881 = 11218^2 + 5609^2 .

It is not a de Polignac number, because 157304405 - 2⁶ = 157304341 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 1991156 + ... + 1991234.

It is an arithmetic number, because the mean of its divisors is an integer number (10773091).

Almost surely, 2^157304405 is an apocalyptic number.

It is an amenable number.

157304405 is a deficient number, since it is larger than the sum of its proper divisors (36611233).

157304405 is an frugal number, since it uses more digits than its factorization.

157304405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 157304405 is about 12542.1052857963. The cubic root of 157304405 is about 539.8175023449.

The spelling of 157304405 in words is "one hundred fifty-seven million, three hundred four thousand, four hundred five".