78028432 has 20 divisors (see below), whose sum is σ = 153311616. Its totient is φ = 38464160.

The previous prime is 78028429. The next prime is 78028439. The reversal of 78028432 is 23482087.

It is not an unprimeable number, because it can be changed into a prime (78028439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33208 + ... + 35479.

Almost surely, 2^78028432 is an apocalyptic number.

It is an amenable number.

78028432 is a deficient number, since it is larger than the sum of its proper divisors (75283184).

78028432 is a wasteful number, since it uses less digits than its factorization.

78028432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68766 (or 68760 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 78028432 is about 8833.3703647023. The cubic root of 78028432 is about 427.3177764921.

The spelling of 78028432 in words is "seventy-eight million, twenty-eight thousand, four hundred thirty-two".