78354828 has 36 divisors (see below), whose sum is σ = 202282080. Its totient is φ = 25562016.

The previous prime is 78354827. The next prime is 78354833. The reversal of 78354828 is 82845387.

78354828 is a `hidden beast` number, since 7 + 83 + 548 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×78354828² = 12278958141819168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78354827) 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 11 ways as a sum of consecutive naturals, for example, 21463 + ... + 24846.

Almost surely, 2^78354828 is an apocalyptic number.

It is an amenable number.

78354828 is an abundant number, since it is smaller than the sum of its proper divisors (123927252).

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

78354828 is a wasteful number, since it uses less digits than its factorization.

78354828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46366 (or 46361 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 78354828 is about 8851.8262522487. The cubic root of 78354828 is about 427.9127766473.

It can be divided in two parts, 783 and 54828, that added together give a triangular number (55611 = T₃₃₃).

The spelling of 78354828 in words is "seventy-eight million, three hundred fifty-four thousand, eight hundred twenty-eight".