72987078 has 8 divisors (see below), whose sum is σ = 145974168. Its totient is φ = 24329024.

The previous prime is 72987067. The next prime is 72987097. The reversal of 72987078 is 87078927.

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

72987078 is an admirable number.

It is a super-2 number, since 2×72987078² = 10654227109956168, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6082251 + ... + 6082262.

It is an arithmetic number, because the mean of its divisors is an integer number (18246771).

Almost surely, 2^72987078 is an apocalyptic number.

72987078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

72987078 is a wasteful number, since it uses less digits than its factorization.

72987078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12164518.

The product of its (nonzero) digits is 395136, while the sum is 48.

The square root of 72987078 is about 8543.2475089980. The cubic root of 72987078 is about 417.9092581733.

The spelling of 72987078 in words is "seventy-two million, nine hundred eighty-seven thousand, seventy-eight".