78142004 has 6 divisors (see below), whose sum is σ = 136748514. Its totient is φ = 39071000.

The previous prime is 78141997. The next prime is 78142021. The reversal of 78142004 is 40024187.

It can be written as a sum of positive squares in only one way, i.e., 60062500 + 18079504 = 7750^2 + 4252^2 .

It is a super-2 number, since 2×78142004² = 12212345578272032, 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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9767747 + ... + 9767754.

It is an arithmetic number, because the mean of its divisors is an integer number (22791419).

Almost surely, 2^78142004 is an apocalyptic number.

It is an amenable number.

78142004 is a deficient number, since it is larger than the sum of its proper divisors (58606510).

78142004 is a wasteful number, since it uses less digits than its factorization.

78142004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19535505 (or 19535503 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 78142004 is about 8839.7966039949. The cubic root of 78142004 is about 427.5249992790.

The spelling of 78142004 in words is "seventy-eight million, one hundred forty-two thousand, four".