73878545 has 8 divisors (see below), whose sum is σ = 95473896. Its totient is φ = 54556416.

The previous prime is 73878533. The next prime is 73878547. The reversal of 73878545 is 54587837.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1577536 + 72301009 = 1256^2 + 8503^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 73878545 - 2¹⁶ = 73813009 is a prime.

It is a super-2 number, since 2×73878545² = 10916078822634050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73878545.

It is not an unprimeable number, because it can be changed into a prime (73878547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568232 + ... + 568361.

It is an arithmetic number, because the mean of its divisors is an integer number (11934237).

Almost surely, 2^73878545 is an apocalyptic number.

It is an amenable number.

73878545 is a deficient number, since it is larger than the sum of its proper divisors (21595351).

73878545 is a wasteful number, since it uses less digits than its factorization.

73878545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136611.

The product of its digits is 940800, while the sum is 47.

The square root of 73878545 is about 8595.2629395499. The cubic root of 73878545 is about 419.6038308867.

The spelling of 73878545 in words is "seventy-three million, eight hundred seventy-eight thousand, five hundred forty-five".