162420578 has 4 divisors (see below), whose sum is σ = 243630870. Its totient is φ = 81210288.

The previous prime is 162420571. The next prime is 162420611. The reversal of 162420578 is 875024261.

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., 158432569 + 3988009 = 12587^2 + 1997^2 .

It is not an unprimeable number, because it can be changed into a prime (162420571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40605143 + ... + 40605146.

Almost surely, 2^162420578 is an apocalyptic number.

162420578 is a deficient number, since it is larger than the sum of its proper divisors (81210292).

162420578 is an equidigital number, since it uses as much as digits as its factorization.

162420578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81210291.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 162420578 is about 12744.4332161144. The cubic root of 162420578 is about 545.6075238576.

The spelling of 162420578 in words is "one hundred sixty-two million, four hundred twenty thousand, five hundred seventy-eight".