75444090 has 32 divisors (see below), whose sum is σ = 181327680. Its totient is φ = 20089344.

The previous prime is 75444043. The next prime is 75444091. The reversal of 75444090 is 9044457.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (75444091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26517 + ... + 29223.

It is an arithmetic number, because the mean of its divisors is an integer number (5666490).

Almost surely, 2^75444090 is an apocalyptic number.

75444090 is an abundant number, since it is smaller than the sum of its proper divisors (105883590).

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

75444090 is a wasteful number, since it uses less digits than its factorization.

75444090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3646.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 75444090 is about 8685.8557436789. The cubic root of 75444090 is about 422.5470507689.

It can be divided in two parts, 754 and 44090, that added together give a palindrome (44844).

The spelling of 75444090 in words is "seventy-five million, four hundred forty-four thousand, ninety".