78948450 has 144 divisors (see below), whose sum is σ = 246519936. Its totient is φ = 17740800.

The previous prime is 78948409. The next prime is 78948451. The reversal of 78948450 is 5484987.

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

It is a junction number, because it is equal to n+sod(n) for n = 78948396 and 78948405.

It is not an unprimeable number, because it can be changed into a prime (78948451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 223474 + ... + 223826.

It is an arithmetic number, because the mean of its divisors is an integer number (1711944).

Almost surely, 2^78948450 is an apocalyptic number.

78948450 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78948450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123259968).

78948450 is an abundant number, since it is smaller than the sum of its proper divisors (167571486).

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

78948450 is a wasteful number, since it uses less digits than its factorization.

78948450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 78948450 is about 8885.2940300251. The cubic root of 78948450 is about 428.9906920894.

The spelling of 78948450 in words is "seventy-eight million, nine hundred forty-eight thousand, four hundred fifty".