75434220 has 96 divisors (see below), whose sum is σ = 242827200. Its totient is φ = 19418112.

The previous prime is 75434209. The next prime is 75434221. The reversal of 75434220 is 2243457.

75434220 is a `hidden beast` number, since 7 + 5 + 434 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (75434221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13252 + ... + 18068.

It is an arithmetic number, because the mean of its divisors is an integer number (2529450).

Almost surely, 2^75434220 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 75434220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121413600).

75434220 is an abundant number, since it is smaller than the sum of its proper divisors (167392980).

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

75434220 is a wasteful number, since it uses less digits than its factorization.

75434220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4864 (or 4856 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 75434220 is about 8685.2875600063. The cubic root of 75434220 is about 422.5286233424.

Adding to 75434220 its reverse (2243457), we get a palindrome (77677677).

The spelling of 75434220 in words is "seventy-five million, four hundred thirty-four thousand, two hundred twenty".