78890423040 has 1440 divisors, whose sum is σ = 352264562496. Its totient is φ = 16562257920.

The previous prime is 78890422969. The next prime is 78890423077. The reversal of 78890423040 is 4032409887.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 252045924 + ... + 252046236.

Almost surely, 2^78890423040 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 78890423040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176132281248).

78890423040 is an abundant number, since it is smaller than the sum of its proper divisors (273374139456).

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

78890423040 is a wasteful number, since it uses less digits than its factorization.

78890423040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 78890423040 in words is "seventy-eight billion, eight hundred ninety million, four hundred twenty-three thousand, forty".