78355432 has 8 divisors (see below), whose sum is σ = 146916450. Its totient is φ = 39177712.

The previous prime is 78355427. The next prime is 78355441. The reversal of 78355432 is 23455387.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 31651876 = 6834^2 + 5626^2 .

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

It is a super-2 number, since 2×78355432² = 12279147447813248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78355391 and 78355400.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4897207 + ... + 4897222.

Almost surely, 2^78355432 is an apocalyptic number.

It is an amenable number.

78355432 is a deficient number, since it is larger than the sum of its proper divisors (68561018).

78355432 is a wasteful number, since it uses less digits than its factorization.

78355432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9794435 (or 9794431 counting only the distinct ones).

The product of its digits is 100800, while the sum is 37.

The square root of 78355432 is about 8851.8603694365. The cubic root of 78355432 is about 427.9138761697.

It can be divided in two parts, 78355 and 432, that added together give a palindrome (78787).

The spelling of 78355432 in words is "seventy-eight million, three hundred fifty-five thousand, four hundred thirty-two".