78867542 has 16 divisors (see below), whose sum is σ = 129563280. Its totient is φ = 35782752.

The previous prime is 78867541. The next prime is 78867557. The reversal of 78867542 is 24576887.

It is a super-2 number, since 2×78867542² = 12440178362243528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78867541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24173 + ... + 27240.

It is an arithmetic number, because the mean of its divisors is an integer number (8097705).

Almost surely, 2^78867542 is an apocalyptic number.

78867542 is a deficient number, since it is larger than the sum of its proper divisors (50695738).

78867542 is a wasteful number, since it uses less digits than its factorization.

78867542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51487.

The product of its digits is 752640, while the sum is 47.

The square root of 78867542 is about 8880.7399466486. The cubic root of 78867542 is about 428.8440958298.

The spelling of 78867542 in words is "seventy-eight million, eight hundred sixty-seven thousand, five hundred forty-two".