78910540 has 12 divisors (see below), whose sum is σ = 165712176. Its totient is φ = 31564208.

The previous prime is 78910519. The next prime is 78910541. The reversal of 78910540 is 4501987.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 78910496 and 78910505.

It is not an unprimeable number, because it can be changed into a prime (78910541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1972744 + ... + 1972783.

It is an arithmetic number, because the mean of its divisors is an integer number (13809348).

Almost surely, 2^78910540 is an apocalyptic number.

It is an amenable number.

78910540 is an abundant number, since it is smaller than the sum of its proper divisors (86801636).

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

78910540 is a wasteful number, since it uses less digits than its factorization.

78910540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3945536 (or 3945534 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 78910540 is about 8883.1604736152. The cubic root of 78910540 is about 428.9220158797.

The spelling of 78910540 in words is "seventy-eight million, nine hundred ten thousand, five hundred forty".