72497878 has 8 divisors (see below), whose sum is σ = 108805320. Its totient is φ = 36229440.

The previous prime is 72497857. The next prime is 72497879. The reversal of 72497878 is 87879427.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72497879) by changing a digit.

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, 4548 + ... + 12871.

It is an arithmetic number, because the mean of its divisors is an integer number (13600665).

Almost surely, 2^72497878 is an apocalyptic number.

72497878 is a deficient number, since it is larger than the sum of its proper divisors (36307442).

72497878 is a wasteful number, since it uses less digits than its factorization.

72497878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19502.

The product of its digits is 1580544, while the sum is 52.

The square root of 72497878 is about 8514.5685739208. The cubic root of 72497878 is about 416.9734775633.

The spelling of 72497878 in words is "seventy-two million, four hundred ninety-seven thousand, eight hundred seventy-eight".