75242290 has 8 divisors (see below), whose sum is σ = 135436140. Its totient is φ = 30096912.

The previous prime is 75242281. The next prime is 75242311. The reversal of 75242290 is 9224257.

It can be written as a sum of positive squares in 2 ways, for example, as 73770921 + 1471369 = 8589^2 + 1213^2 .

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

It is a super-2 number, since 2×75242290² = 11322804408888200, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 3762105 + ... + 3762124.

Almost surely, 2^75242290 is an apocalyptic number.

75242290 is a deficient number, since it is larger than the sum of its proper divisors (60193850).

75242290 is a wasteful number, since it uses less digits than its factorization.

75242290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7524236.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 75242290 is about 8674.2313780530. The cubic root of 75242290 is about 422.1699673969.

The spelling of 75242290 in words is "seventy-five million, two hundred forty-two thousand, two hundred ninety".