78247422 has 24 divisors (see below), whose sum is σ = 184948920. Its totient is φ = 23711280.

The previous prime is 78247399. The next prime is 78247483. The reversal of 78247422 is 22474287.

It is a super-2 number, since 2×78247422² = 12245318099292168, 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 11 ways as a sum of consecutive naturals, for example, 197397 + ... + 197792.

It is an arithmetic number, because the mean of its divisors is an integer number (7706205).

Almost surely, 2^78247422 is an apocalyptic number.

78247422 is an abundant number, since it is smaller than the sum of its proper divisors (106701498).

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

78247422 is a wasteful number, since it uses less digits than its factorization.

78247422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395208 (or 395205 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 78247422 is about 8845.7572881015. The cubic root of 78247422 is about 427.7171647233.

The spelling of 78247422 in words is "seventy-eight million, two hundred forty-seven thousand, four hundred twenty-two".