72078196 has 24 divisors (see below), whose sum is σ = 128913120. Its totient is φ = 35254752.

The previous prime is 72078187. The next prime is 72078197. The reversal of 72078196 is 69187027.

It is a super-2 number, since 2×72078196² = 10390532677228832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72078197) 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, 34510 + ... + 36538.

It is an arithmetic number, because the mean of its divisors is an integer number (5371380).

Almost surely, 2^72078196 is an apocalyptic number.

It is an amenable number.

72078196 is a deficient number, since it is larger than the sum of its proper divisors (56834924).

72078196 is a wasteful number, since it uses less digits than its factorization.

72078196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223 (or 2221 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 72078196 is about 8489.8878673396. The cubic root of 72078196 is about 416.1673158940.

The spelling of 72078196 in words is "seventy-two million, seventy-eight thousand, one hundred ninety-six".