77020022 has 4 divisors (see below), whose sum is σ = 115530036. Its totient is φ = 38510010.

The previous prime is 77020007. The next prime is 77020033. The reversal of 77020022 is 22002077.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 77019976 and 77020003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19255004 + ... + 19255007.

It is an arithmetic number, because the mean of its divisors is an integer number (28882509).

Almost surely, 2^77020022 is an apocalyptic number.

77020022 is a deficient number, since it is larger than the sum of its proper divisors (38510014).

77020022 is a wasteful number, since it uses less digits than its factorization.

77020022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38510013.

The product of its (nonzero) digits is 392, while the sum is 20.

The square root of 77020022 is about 8776.1051725694. The cubic root of 77020022 is about 425.4689577801.

Adding to 77020022 its reverse (22002077), we get a palindrome (99022099).

The spelling of 77020022 in words is "seventy-seven million, twenty thousand, twenty-two".