78040554 has 16 divisors (see below), whose sum is σ = 156753792. Its totient is φ = 25901408.

The previous prime is 78040553. The next prime is 78040583. The reversal of 78040554 is 45504087.

It is not an unprimeable number, because it can be changed into a prime (78040553) 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, 26514 + ... + 29309.

It is an arithmetic number, because the mean of its divisors is an integer number (9797112).

Almost surely, 2^78040554 is an apocalyptic number.

78040554 is an abundant number, since it is smaller than the sum of its proper divisors (78713238).

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

78040554 is a wasteful number, since it uses less digits than its factorization.

78040554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56061.

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 78040554 is about 8834.0564861223. The cubic root of 78040554 is about 427.3399038019.

The spelling of 78040554 in words is "seventy-eight million, forty thousand, five hundred fifty-four".