78540294 has 32 divisors (see below), whose sum is σ = 185713920. Its totient is φ = 21665952.

The previous prime is 78540211. The next prime is 78540313. The reversal of 78540294 is 49204587.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31024 + ... + 33459.

It is an arithmetic number, because the mean of its divisors is an integer number (5803560).

Almost surely, 2^78540294 is an apocalyptic number.

78540294 is an abundant number, since it is smaller than the sum of its proper divisors (107173626).

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

78540294 is a wasteful number, since it uses less digits than its factorization.

78540294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64524.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 78540294 is about 8862.2962035806. The cubic root of 78540294 is about 428.2501340151.

The spelling of 78540294 in words is "seventy-eight million, five hundred forty thousand, two hundred ninety-four".