73405878 has 32 divisors (see below), whose sum is σ = 180692736. Its totient is φ = 19359648.

The previous prime is 73405837. The next prime is 73405879. The reversal of 73405878 is 87850437.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73405879) 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 15 ways as a sum of consecutive naturals, for example, 66676 + ... + 67767.

It is an arithmetic number, because the mean of its divisors is an integer number (5646648).

Almost surely, 2^73405878 is an apocalyptic number.

73405878 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

73405878 is an abundant number, since it is smaller than the sum of its proper divisors (107286858).

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

73405878 is a wasteful number, since it uses less digits than its factorization.

73405878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134468.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 73405878 is about 8567.7230347392. The cubic root of 73405878 is about 418.7070555797.

The spelling of 73405878 in words is "seventy-three million, four hundred five thousand, eight hundred seventy-eight".