73378406 has 4 divisors (see below), whose sum is σ = 110067612. Its totient is φ = 36689202.

The previous prime is 73378387. The next prime is 73378423. The reversal of 73378406 is 60487337.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60487337 = 89 ⋅679633.

It is a self number, because there is not a number n which added to its sum of digits gives 73378406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18344600 + ... + 18344603.

It is an arithmetic number, because the mean of its divisors is an integer number (27516903).

Almost surely, 2^73378406 is an apocalyptic number.

73378406 is a deficient number, since it is larger than the sum of its proper divisors (36689206).

73378406 is a wasteful number, since it uses less digits than its factorization.

73378406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36689205.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 73378406 is about 8566.1196582817. The cubic root of 73378406 is about 418.6548156420.

The spelling of 73378406 in words is "seventy-three million, three hundred seventy-eight thousand, four hundred six".