8978465405 has 16 divisors (see below), whose sum is σ = 13260503424. Its totient is φ = 5683072320.

The previous prime is 8978465383. The next prime is 8978465411. The reversal of 8978465405 is 5045648798.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-8978465405 is a prime.

It is a super-2 number, since 2×8978465405² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9865991 + ... + 9866900.

It is an arithmetic number, because the mean of its divisors is an integer number (828781464).

Almost surely, 2^8978465405 is an apocalyptic number.

It is an amenable number.

8978465405 is a deficient number, since it is larger than the sum of its proper divisors (4282038019).

8978465405 is a wasteful number, since it uses less digits than its factorization.

8978465405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19732916.

The product of its (nonzero) digits is 9676800, while the sum is 56.

The square root of 8978465405 is about 94754.7645503908. The cubic root of 8978465405 is about 2078.4234698384.

The spelling of 8978465405 in words is "eight billion, nine hundred seventy-eight million, four hundred sixty-five thousand, four hundred five".