75022640 has 160 divisors (see below), whose sum is σ = 229271040. Its totient is φ = 22118400.

The previous prime is 75022631. The next prime is 75022663. The reversal of 75022640 is 4622057.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116720 + ... + 117360.

It is an arithmetic number, because the mean of its divisors is an integer number (1432944).

Almost surely, 2^75022640 is an apocalyptic number.

75022640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 75022640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114635520).

75022640 is an abundant number, since it is smaller than the sum of its proper divisors (154248400).

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

75022640 is a wasteful number, since it uses less digits than its factorization.

75022640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 685 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 75022640 is about 8661.5610602247. The cubic root of 75022640 is about 421.7587624163.

Adding to 75022640 its reverse (4622057), we get a palindrome (79644697).

The spelling of 75022640 in words is "seventy-five million, twenty-two thousand, six hundred forty".