1864426005 has 96 divisors (see below), whose sum is σ = 3698472960. Its totient is φ = 895173120.

The previous prime is 1864426001. The next prime is 1864426007. The reversal of 1864426005 is 5006244681.

1864426005 is a `hidden beast` number, since 1 + 8 + 6 + 4 + 42 + 600 + 5 = 666.

It is not a de Polignac number, because 1864426005 - 2² = 1864426001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1864426001) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 646156 + ... + 649034.

It is an arithmetic number, because the mean of its divisors is an integer number (38525760).

Almost surely, 2^1864426005 is an apocalyptic number.

1864426005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1864426005 is a deficient number, since it is larger than the sum of its proper divisors (1834046955).

1864426005 is a wasteful number, since it uses less digits than its factorization.

1864426005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2953 (or 2941 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 1864426005 is about 43178.9995831307. Note that the first 3 decimals coincide. The cubic root of 1864426005 is about 1230.7836469651.

Adding to 1864426005 its sum of digits (36), we get a square (1864426041 = 43179²).

The spelling of 1864426005 in words is "one billion, eight hundred sixty-four million, four hundred twenty-six thousand, five".