78242548 has 12 divisors (see below), whose sum is σ = 138658240. Its totient is φ = 38625912.

The previous prime is 78242539. The next prime is 78242557. The reversal of 78242548 is 84524287.

It is an interprime number because it is at equal distance from previous prime (78242539) and next prime (78242557).

It is a super-2 number, since 2×78242548² = 12243792635064608, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 78242548.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123486 + ... + 124117.

Almost surely, 2^78242548 is an apocalyptic number.

It is an amenable number.

78242548 is a deficient number, since it is larger than the sum of its proper divisors (60415692).

78242548 is a wasteful number, since it uses less digits than its factorization.

78242548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247686 (or 247684 counting only the distinct ones).

The product of its digits is 143360, while the sum is 40.

The square root of 78242548 is about 8845.4817845044. The cubic root of 78242548 is about 427.7082837630.

The spelling of 78242548 in words is "seventy-eight million, two hundred forty-two thousand, five hundred forty-eight".