78219532 has 12 divisors (see below), whose sum is σ = 138533976. Its totient is φ = 38638400.

The previous prime is 78219529. The next prime is 78219553. The reversal of 78219532 is 23591287.

It is a super-2 number, since 2×78219532² = 12236590372598048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78219491 and 78219500.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117469 + ... + 118132.

It is an arithmetic number, because the mean of its divisors is an integer number (11544498).

Almost surely, 2^78219532 is an apocalyptic number.

It is an amenable number.

78219532 is a deficient number, since it is larger than the sum of its proper divisors (60314444).

78219532 is a wasteful number, since it uses less digits than its factorization.

78219532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235688 (or 235686 counting only the distinct ones).

The product of its digits is 30240, while the sum is 37.

The square root of 78219532 is about 8844.1806856260. The cubic root of 78219532 is about 427.6663411136. Note that the first 3 decimals are identical.

The spelling of 78219532 in words is "seventy-eight million, two hundred nineteen thousand, five hundred thirty-two".