72103978 has 8 divisors (see below), whose sum is σ = 108781668. Its totient is φ = 35843424.

The previous prime is 72103961. The next prime is 72103981. The reversal of 72103978 is 87930127.

It can be written as a sum of positive squares in 2 ways, for example, as 64112049 + 7991929 = 8007^2 + 2827^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 103851 + ... + 104542.

Almost surely, 2^72103978 is an apocalyptic number.

72103978 is a deficient number, since it is larger than the sum of its proper divisors (36677690).

72103978 is a wasteful number, since it uses less digits than its factorization.

72103978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208568.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 72103978 is about 8491.4061261961. The cubic root of 72103978 is about 416.2169302817.

The spelling of 72103978 in words is "seventy-two million, one hundred three thousand, nine hundred seventy-eight".