75144474 has 24 divisors (see below), whose sum is σ = 164397792. Its totient is φ = 24804360.

The previous prime is 75144457. The next prime is 75144479. The reversal of 75144474 is 47444157.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (75144479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18412 + ... + 22119.

It is an arithmetic number, because the mean of its divisors is an integer number (6849908).

Almost surely, 2^75144474 is an apocalyptic number.

75144474 is an abundant number, since it is smaller than the sum of its proper divisors (89253318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

75144474 is a wasteful number, since it uses less digits than its factorization.

75144474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40642 (or 40639 counting only the distinct ones).

The product of its digits is 62720, while the sum is 36.

The square root of 75144474 is about 8668.5912350278. The cubic root of 75144474 is about 421.9869458313.

The spelling of 75144474 in words is "seventy-five million, one hundred forty-four thousand, four hundred seventy-four".