242547890 has 32 divisors (see below), whose sum is σ = 474510960. Its totient is φ = 88729344.

The previous prime is 242547859. The next prime is 242547947. The reversal of 242547890 is 98745242.

It can be written as a sum of positive squares in 8 ways, for example, as 14145121 + 228402769 = 3761^2 + 15113^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5612 + ... + 22728.

Almost surely, 2^242547890 is an apocalyptic number.

242547890 is a deficient number, since it is larger than the sum of its proper divisors (231963070).

242547890 is a wasteful number, since it uses less digits than its factorization.

242547890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17246.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 242547890 is about 15573.9490817198. The cubic root of 242547890 is about 623.6378997826.

The spelling of 242547890 in words is "two hundred forty-two million, five hundred forty-seven thousand, eight hundred ninety".