78385004 has 6 divisors (see below), whose sum is σ = 137173764. Its totient is φ = 39192500.

The previous prime is 78385003. The next prime is 78385007. The reversal of 78385004 is 40058387.

It is a super-2 number, since 2×78385004² = 12288417704160032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78385003) 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 as a sum of consecutive naturals, namely, 9798122 + ... + 9798129.

It is an arithmetic number, because the mean of its divisors is an integer number (22862294).

Almost surely, 2^78385004 is an apocalyptic number.

It is an amenable number.

78385004 is a deficient number, since it is larger than the sum of its proper divisors (58788760).

78385004 is a wasteful number, since it uses less digits than its factorization.

78385004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19596255 (or 19596253 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 78385004 is about 8853.5305951920. The cubic root of 78385004 is about 427.9677021658.

The spelling of 78385004 in words is "seventy-eight million, three hundred eighty-five thousand, four".