76445220 has 24 divisors (see below), whose sum is σ = 214046784. Its totient is φ = 20385376.

The previous prime is 76445167. The next prime is 76445233. The reversal of 76445220 is 2254467.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636984 + ... + 637103.

It is an arithmetic number, because the mean of its divisors is an integer number (8918616).

Almost surely, 2^76445220 is an apocalyptic number.

It is an amenable number.

76445220 is an abundant number, since it is smaller than the sum of its proper divisors (137601564).

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

76445220 is a wasteful number, since it uses less digits than its factorization.

76445220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274099 (or 1274097 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 76445220 is about 8743.2957172910. The cubic root of 76445220 is about 424.4078859401.

Adding to 76445220 its reverse (2254467), we get a palindrome (78699687).

The spelling of 76445220 in words is "seventy-six million, four hundred forty-five thousand, two hundred twenty".