75521808 has 100 divisors (see below), whose sum is σ = 230161360. Its totient is φ = 23841216.

The previous prime is 75521807. The next prime is 75521813. The reversal of 75521808 is 80812557.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (75521807) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23091 + ... + 26157.

Almost surely, 2^75521808 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 75521808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115080680).

75521808 is an abundant number, since it is smaller than the sum of its proper divisors (154639552).

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

75521808 is a wasteful number, since it uses less digits than its factorization.

75521808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106 (or 3091 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 36.

The square root of 75521808 is about 8690.3284172694. The cubic root of 75521808 is about 422.6920952281.

The spelling of 75521808 in words is "seventy-five million, five hundred twenty-one thousand, eight hundred eight".