78183672 has 32 divisors (see below), whose sum is σ = 223382400. Its totient is φ = 22338144.

The previous prime is 78183671. The next prime is 78183691. The reversal of 78183672 is 27638187.

It is a super-2 number, since 2×78183672² = 12225373134807168, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78183671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232522 + ... + 232857.

It is an arithmetic number, because the mean of its divisors is an integer number (6980700).

Almost surely, 2^78183672 is an apocalyptic number.

It is an amenable number.

78183672 is an abundant number, since it is smaller than the sum of its proper divisors (145198728).

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

78183672 is a wasteful number, since it uses less digits than its factorization.

78183672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465395 (or 465391 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 78183672 is about 8842.1531314494. The cubic root of 78183672 is about 427.6009761132.

The spelling of 78183672 in words is "seventy-eight million, one hundred eighty-three thousand, six hundred seventy-two".