78904202240 has 176 divisors, whose sum is σ = 199145260800. Its totient is φ = 29953523712.

The previous prime is 78904202233. The next prime is 78904202243. The reversal of 78904202240 is 4220240987.

It is a super-2 number, since 2×78904202240² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78904202194 and 78904202203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78904202243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8755817 + ... + 8764823.

Almost surely, 2^78904202240 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 78904202240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99572630400).

78904202240 is an abundant number, since it is smaller than the sum of its proper divisors (120241058560).

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

78904202240 is a wasteful number, since it uses less digits than its factorization.

78904202240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9120 (or 9102 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The spelling of 78904202240 in words is "seventy-eight billion, nine hundred four million, two hundred two thousand, two hundred forty".