78147046 has 4 divisors (see below), whose sum is σ = 117220572. Its totient is φ = 39073522.

The previous prime is 78147007. The next prime is 78147053. The reversal of 78147046 is 64074187.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×78147046² = 12213921597052232, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78146996 and 78147014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19536760 + ... + 19536763.

It is an arithmetic number, because the mean of its divisors is an integer number (29305143).

Almost surely, 2^78147046 is an apocalyptic number.

78147046 is a deficient number, since it is larger than the sum of its proper divisors (39073526).

78147046 is a wasteful number, since it uses less digits than its factorization.

78147046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39073525.

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 78147046 is about 8840.0817869520. The cubic root of 78147046 is about 427.5341942257.

The spelling of 78147046 in words is "seventy-eight million, one hundred forty-seven thousand, forty-six".