78369652 has 6 divisors (see below), whose sum is σ = 137146898. Its totient is φ = 39184824.

The previous prime is 78369649. The next prime is 78369701. The reversal of 78369652 is 25696387.

It can be written as a sum of positive squares in only one way, i.e., 65221776 + 13147876 = 8076^2 + 3626^2 .

It is a super-2 number, since 2×78369652² = 12283604709202208, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

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, 9796203 + ... + 9796210.

Almost surely, 2^78369652 is an apocalyptic number.

It is an amenable number.

78369652 is a deficient number, since it is larger than the sum of its proper divisors (58777246).

78369652 is a wasteful number, since it uses less digits than its factorization.

78369652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19592417 (or 19592415 counting only the distinct ones).

The product of its digits is 544320, while the sum is 46.

The square root of 78369652 is about 8852.6635539819. The cubic root of 78369652 is about 427.9397606430.

The spelling of 78369652 in words is "seventy-eight million, three hundred sixty-nine thousand, six hundred fifty-two".