78944625 has 96 divisors (see below), whose sum is σ = 155361024. Its totient is φ = 39916800.

The previous prime is 78944623. The next prime is 78944627. The reversal of 78944625 is 52644987.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78944623) and next prime (78944627).

It is not a de Polignac number, because 78944625 - 2¹ = 78944623 is a prime.

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

Its product of digits (483840) is a multiple of the sum of its prime divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78944623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 698569 + ... + 698681.

It is an arithmetic number, because the mean of its divisors is an integer number (1618344).

Almost surely, 2^78944625 is an apocalyptic number.

78944625 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78944625 is a deficient number, since it is larger than the sum of its proper divisors (76416399).

78944625 is a wasteful number, since it uses less digits than its factorization.

78944625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 144 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 78944625 is about 8885.0787841189. The cubic root of 78944625 is about 428.9837638728.

The spelling of 78944625 in words is "seventy-eight million, nine hundred forty-four thousand, six hundred twenty-five".