73405906 has 16 divisors (see below), whose sum is σ = 127612800. Its totient is φ = 31016160.

The previous prime is 73405883. The next prime is 73405907. The reversal of 73405906 is 60950437.

It is not an unprimeable number, because it can be changed into a prime (73405907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35931 + ... + 37918.

It is an arithmetic number, because the mean of its divisors is an integer number (7975800).

Almost surely, 2^73405906 is an apocalyptic number.

73405906 is a deficient number, since it is larger than the sum of its proper divisors (54206894).

73405906 is a wasteful number, since it uses less digits than its factorization.

73405906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73929.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 73405906 is about 8567.7246687788. The cubic root of 73405906 is about 418.7071088170.

The spelling of 73405906 in words is "seventy-three million, four hundred five thousand, nine hundred six".