78422488 has 8 divisors (see below), whose sum is σ = 147042180. Its totient is φ = 39211240.

The previous prime is 78422453. The next prime is 78422489. The reversal of 78422488 is 88422487.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78422488² = 12300173248220288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78422489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4901398 + ... + 4901413.

Almost surely, 2^78422488 is an apocalyptic number.

It is an amenable number.

78422488 is a deficient number, since it is larger than the sum of its proper divisors (68619692).

78422488 is a wasteful number, since it uses less digits than its factorization.

78422488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9802817 (or 9802813 counting only the distinct ones).

The product of its digits is 229376, while the sum is 43.

The square root of 78422488 is about 8855.6472377800. The cubic root of 78422488 is about 428.0359098761.

Subtracting 78422488 from its reverse (88422487), we obtain a palindrome (9999999).

The spelling of 78422488 in words is "seventy-eight million, four hundred twenty-two thousand, four hundred eighty-eight".