78220308 has 24 divisors (see below), whose sum is σ = 188808480. Its totient is φ = 25174240.

The previous prime is 78220297. The next prime is 78220313. The reversal of 78220308 is 80302287.

It is a super-2 number, since 2×78220308² = 12236833167229728, which contains 22 as substring.

It is a congruent number.

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, 112038 + ... + 112733.

It is an arithmetic number, because the mean of its divisors is an integer number (7867020).

Almost surely, 2^78220308 is an apocalyptic number.

It is an amenable number.

78220308 is an abundant number, since it is smaller than the sum of its proper divisors (110588172).

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

78220308 is a wasteful number, since it uses less digits than its factorization.

78220308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224807 (or 224805 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 78220308 is about 8844.2245561722. The cubic root of 78220308 is about 427.6677553724.

The spelling of 78220308 in words is "seventy-eight million, two hundred twenty thousand, three hundred eight".