78905092 has 72 divisors (see below), whose sum is σ = 171920000. Its totient is φ = 31667328.

The previous prime is 78905089. The next prime is 78905131. The reversal of 78905092 is 29050987.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 396409 + ... + 396607.

Almost surely, 2^78905092 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78905092, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85960000).

78905092 is an abundant number, since it is smaller than the sum of its proper divisors (93014908).

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

78905092 is a wasteful number, since it uses less digits than its factorization.

78905092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 78905092 is about 8882.8538207042. The cubic root of 78905092 is about 428.9121446976.

The spelling of 78905092 in words is "seventy-eight million, nine hundred five thousand, ninety-two".