78385453 has 16 divisors (see below), whose sum is σ = 87160320. Its totient is φ = 70156800.

The previous prime is 78385451. The next prime is 78385457. The reversal of 78385453 is 35458387.

It is a cyclic number.

It is not a de Polignac number, because 78385453 - 2¹ = 78385451 is a prime.

It is a super-2 number, since 2×78385453² = 12288558484030418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78385451) 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 15 ways as a sum of consecutive naturals, for example, 29833 + ... + 32353.

It is an arithmetic number, because the mean of its divisors is an integer number (5447520).

Almost surely, 2^78385453 is an apocalyptic number.

It is an amenable number.

78385453 is a deficient number, since it is larger than the sum of its proper divisors (8774867).

78385453 is a wasteful number, since it uses less digits than its factorization.

78385453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628.

The product of its digits is 403200, while the sum is 43.

The square root of 78385453 is about 8853.5559522714. Note that the first 3 decimals coincide. The cubic root of 78385453 is about 427.9685193167.

The spelling of 78385453 in words is "seventy-eight million, three hundred eighty-five thousand, four hundred fifty-three".