78749496 has 128 divisors (see below), whose sum is σ = 253478400. Its totient is φ = 22464864.

The previous prime is 78749459. The next prime is 78749497. The reversal of 78749496 is 69494787.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78749497) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122151 + ... + 122793.

It is an arithmetic number, because the mean of its divisors is an integer number (1980300).

Almost surely, 2^78749496 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 78749496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126739200).

78749496 is an abundant number, since it is smaller than the sum of its proper divisors (174728904).

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

78749496 is an equidigital number, since it uses as much as digits as its factorization.

78749496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677 (or 655 counting only the distinct ones).

The product of its digits is 3048192, while the sum is 54.

The square root of 78749496 is about 8874.0912774210. The cubic root of 78749496 is about 428.6300297010.

The spelling of 78749496 in words is "seventy-eight million, seven hundred forty-nine thousand, four hundred ninety-six".