78050644 has 48 divisors (see below), whose sum is σ = 161021952. Its totient is φ = 32411232.

The previous prime is 78050641. The next prime is 78050671. The reversal of 78050644 is 44605087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78050641) 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, 166899 + ... + 167365.

It is an arithmetic number, because the mean of its divisors is an integer number (3354624).

Almost surely, 2^78050644 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 78050644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80510976).

78050644 is an abundant number, since it is smaller than the sum of its proper divisors (82971308).

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

78050644 is a wasteful number, since it uses less digits than its factorization.

78050644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 78050644 is about 8834.6275529872. The cubic root of 78050644 is about 427.3583201833.

The spelling of 78050644 in words is "seventy-eight million, fifty thousand, six hundred forty-four".