78210952 has 8 divisors (see below), whose sum is σ = 146645550. Its totient is φ = 39105472.

The previous prime is 78210929. The next prime is 78210953. The reversal of 78210952 is 25901287.

It can be written as a sum of positive squares in only one way, i.e., 78039556 + 171396 = 8834^2 + 414^2 .

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

It is a super-2 number, since 2×78210952² = 12233906025492608, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78210953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4888177 + ... + 4888192.

Almost surely, 2^78210952 is an apocalyptic number.

It is an amenable number.

78210952 is a deficient number, since it is larger than the sum of its proper divisors (68434598).

78210952 is a wasteful number, since it uses less digits than its factorization.

78210952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9776375 (or 9776371 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 78210952 is about 8843.6956076066. The cubic root of 78210952 is about 427.6507034534.

The spelling of 78210952 in words is "seventy-eight million, two hundred ten thousand, nine hundred fifty-two".