72378845 has 32 divisors (see below), whose sum is σ = 111234816. Its totient is φ = 43891200.

The previous prime is 72378833. The next prime is 72378851. The reversal of 72378845 is 54887327.

It is a happy number.

It is not a de Polignac number, because 72378845 - 2¹⁴ = 72362461 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72378796 and 72378805.

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 31 ways as a sum of consecutive naturals, for example, 11705 + ... + 16785.

It is an arithmetic number, because the mean of its divisors is an integer number (3476088).

Almost surely, 2^72378845 is an apocalyptic number.

It is an amenable number.

72378845 is a deficient number, since it is larger than the sum of its proper divisors (38855971).

72378845 is a wasteful number, since it uses less digits than its factorization.

72378845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5141.

The product of its digits is 376320, while the sum is 44.

The square root of 72378845 is about 8507.5757416552. The cubic root of 72378845 is about 416.7451453955.

The spelling of 72378845 in words is "seventy-two million, three hundred seventy-eight thousand, eight hundred forty-five".