75450000 has 120 divisors (see below), whose sum is σ = 244109376. Its totient is φ = 20080000.

The previous prime is 75449989. The next prime is 75450041. The reversal of 75450000 is 5457.

It is a tau number, because it is divible by the number of its divisors (120).

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 23 ways as a sum of consecutive naturals, for example, 149749 + ... + 150251.

Almost surely, 2^75450000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75450000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122054688).

75450000 is an abundant number, since it is smaller than the sum of its proper divisors (168659376).

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

75450000 is an equidigital number, since it uses as much as digits as its factorization.

75450000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 75450000 is about 8686.1959452916. The cubic root of 75450000 is about 422.5580840513.

Adding to 75450000 its reverse (5457), we get a palindrome (75455457).

The spelling of 75450000 in words is "seventy-five million, four hundred fifty thousand".