78338632 has 8 divisors (see below), whose sum is σ = 146884950. Its totient is φ = 39169312.

The previous prime is 78338629. The next prime is 78338641. The reversal of 78338632 is 23683387.

It can be written as a sum of positive squares in only one way, i.e., 49758916 + 28579716 = 7054^2 + 5346^2 .

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

It is a super-2 number, since 2×78338632² = 12273882527262848, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4896157 + ... + 4896172.

Almost surely, 2^78338632 is an apocalyptic number.

It is an amenable number.

78338632 is a deficient number, since it is larger than the sum of its proper divisors (68546318).

78338632 is a wasteful number, since it uses less digits than its factorization.

78338632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9792335 (or 9792331 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

The square root of 78338632 is about 8850.9113655036. The cubic root of 78338632 is about 427.8832913215.

The spelling of 78338632 in words is "seventy-eight million, three hundred thirty-eight thousand, six hundred thirty-two".