78328472 has 8 divisors (see below), whose sum is σ = 146865900. Its totient is φ = 39164232.

The previous prime is 78328463. The next prime is 78328487. The reversal of 78328472 is 27482387.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×78328472² = 12270699051709568, which contains 22 as substring.

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, 4895522 + ... + 4895537.

Almost surely, 2^78328472 is an apocalyptic number.

It is an amenable number.

78328472 is a deficient number, since it is larger than the sum of its proper divisors (68537428).

78328472 is a wasteful number, since it uses less digits than its factorization.

78328472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9791065 (or 9791061 counting only the distinct ones).

The product of its digits is 150528, while the sum is 41.

The square root of 78328472 is about 8850.3373946986. The cubic root of 78328472 is about 427.8647926486.

The spelling of 78328472 in words is "seventy-eight million, three hundred twenty-eight thousand, four hundred seventy-two".