78373405 has 16 divisors (see below), whose sum is σ = 102811968. Its totient is φ = 56880000.

The previous prime is 78373403. The next prime is 78373411. The reversal of 78373405 is 50437387.

It is not a de Polignac number, because 78373405 - 2¹ = 78373403 is a prime.

It is a super-2 number, since 2×78373405² = 12284781222588050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78373403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31870 + ... + 34240.

It is an arithmetic number, because the mean of its divisors is an integer number (6425748).

Almost surely, 2^78373405 is an apocalyptic number.

It is an amenable number.

78373405 is a deficient number, since it is larger than the sum of its proper divisors (24438563).

78373405 is a wasteful number, since it uses less digits than its factorization.

78373405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2988.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 78373405 is about 8852.8755215467. The cubic root of 78373405 is about 427.9465916558.

The spelling of 78373405 in words is "seventy-eight million, three hundred seventy-three thousand, four hundred five".