78409350 has 72 divisors (see below), whose sum is σ = 216961560. Its totient is φ = 20822400.

The previous prime is 78409297. The next prime is 78409361. The reversal of 78409350 is 5390487.

It is a super-2 number, since 2×78409350² = 12296052334845000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 325230 + ... + 325470.

It is an arithmetic number, because the mean of its divisors is an integer number (3013355).

Almost surely, 2^78409350 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78409350, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108480780).

78409350 is an abundant number, since it is smaller than the sum of its proper divisors (138552210).

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

78409350 is a wasteful number, since it uses less digits than its factorization.

78409350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503 (or 251 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 78409350 is about 8854.9054201612. The cubic root of 78409350 is about 428.0120058064.

The spelling of 78409350 in words is "seventy-eight million, four hundred nine thousand, three hundred fifty".