8406478869 has 32 divisors (see below), whose sum is σ = 12158078976. Its totient is φ = 5147089920.

The previous prime is 8406478837. The next prime is 8406478901. The reversal of 8406478869 is 9688746048.

It is an interprime number because it is at equal distance from previous prime (8406478837) and next prime (8406478901).

It is not a de Polignac number, because 8406478869 - 2⁵ = 8406478837 is a prime.

It is a super-2 number, since 2×8406478869² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8406478819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 384459 + ... + 405735.

It is an arithmetic number, because the mean of its divisors is an integer number (379939968).

Almost surely, 2^8406478869 is an apocalyptic number.

It is an amenable number.

8406478869 is a deficient number, since it is larger than the sum of its proper divisors (3751600107).

8406478869 is a wasteful number, since it uses less digits than its factorization.

8406478869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21485.

The product of its (nonzero) digits is 18579456, while the sum is 60.

The square root of 8406478869 is about 91686.8522144806. The cubic root of 8406478869 is about 2033.3152062136.

The spelling of 8406478869 in words is "eight billion, four hundred six million, four hundred seventy-eight thousand, eight hundred sixty-nine".