78354004 has 6 divisors (see below), whose sum is σ = 137119514. Its totient is φ = 39177000.

The previous prime is 78353971. The next prime is 78354007. The reversal of 78354004 is 40045387.

It can be written as a sum of positive squares in only one way, i.e., 74857104 + 3496900 = 8652^2 + 1870^2 .

It is a super-2 number, since 2×78354004² = 12278699885664032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78354007) 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, 9794247 + ... + 9794254.

Almost surely, 2^78354004 is an apocalyptic number.

It is an amenable number.

78354004 is a deficient number, since it is larger than the sum of its proper divisors (58765510).

78354004 is a wasteful number, since it uses less digits than its factorization.

78354004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19588505 (or 19588503 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 78354004 is about 8851.7797080587. The cubic root of 78354004 is about 427.9112766276.

The spelling of 78354004 in words is "seventy-eight million, three hundred fifty-four thousand, four".