78213272 has 16 divisors (see below), whose sum is σ = 154368600. Its totient is φ = 37048320.

The previous prime is 78213263. The next prime is 78213287. The reversal of 78213272 is 27231287.

It is a super-2 number, since 2×78213272² = 12234631833891968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257129 + ... + 257432.

Almost surely, 2^78213272 is an apocalyptic number.

It is an amenable number.

78213272 is a deficient number, since it is larger than the sum of its proper divisors (76155328).

78213272 is a wasteful number, since it uses less digits than its factorization.

78213272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514586 (or 514582 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 78213272 is about 8843.8267735184. The cubic root of 78213272 is about 427.6549319312.

The spelling of 78213272 in words is "seventy-eight million, two hundred thirteen thousand, two hundred seventy-two".