75138290 has 8 divisors (see below), whose sum is σ = 135248940. Its totient is φ = 30055312.

The previous prime is 75138269. The next prime is 75138353. The reversal of 75138290 is 9283157.

It can be written as a sum of positive squares in 2 ways, for example, as 73908409 + 1229881 = 8597^2 + 1109^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 75138290.

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, 3756905 + ... + 3756924.

Almost surely, 2^75138290 is an apocalyptic number.

75138290 is a deficient number, since it is larger than the sum of its proper divisors (60110650).

75138290 is a wasteful number, since it uses less digits than its factorization.

75138290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7513836.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 75138290 is about 8668.2345376668. The cubic root of 75138290 is about 421.9753697356.

The spelling of 75138290 in words is "seventy-five million, one hundred thirty-eight thousand, two hundred ninety".