77450020 has 24 divisors (see below), whose sum is σ = 164707200. Its totient is φ = 30587232.

The previous prime is 77450003. The next prime is 77450029. The reversal of 77450020 is 2005477.

It is not an unprimeable number, because it can be changed into a prime (77450029) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 22930 + ... + 26089.

It is an arithmetic number, because the mean of its divisors is an integer number (6862800).

Almost surely, 2^77450020 is an apocalyptic number.

It is an amenable number.

77450020 is an abundant number, since it is smaller than the sum of its proper divisors (87257180).

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

77450020 is a wasteful number, since it uses less digits than its factorization.

77450020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49107 (or 49105 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 25.

The square root of 77450020 is about 8800.5692997669. The cubic root of 77450020 is about 426.2592777540.

Adding to 77450020 its reverse (2005477), we get a palindrome (79455497).

The spelling of 77450020 in words is "seventy-seven million, four hundred fifty thousand, twenty".