78820252 has 12 divisors (see below), whose sum is σ = 157640560. Its totient is φ = 33780096.

The previous prime is 78820243. The next prime is 78820253. The reversal of 78820252 is 25202887.

78820252 is an admirable number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78820253) 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, 1407477 + ... + 1407532.

Almost surely, 2^78820252 is an apocalyptic number.

It is an amenable number.

78820252 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78820252 is a wasteful number, since it uses less digits than its factorization.

78820252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815020 (or 2815018 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 34.

The square root of 78820252 is about 8878.0770440451. The cubic root of 78820252 is about 428.7583652004.

The spelling of 78820252 in words is "seventy-eight million, eight hundred twenty thousand, two hundred fifty-two".