1865138130 has 64 divisors (see below), whose sum is σ = 5079559680. Its totient is φ = 486784512.

The previous prime is 1865138123. The next prime is 1865138137. The reversal of 1865138130 is 318315681.

1865138130 is a `hidden beast` number, since 1 + 8 + 6 + 513 + 8 + 130 = 666.

It is an interprime number because it is at equal distance from previous prime (1865138123) and next prime (1865138137).

It is not an unprimeable number, because it can be changed into a prime (1865138137) 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, 60799 + ... + 86178.

It is an arithmetic number, because the mean of its divisors is an integer number (79368120).

Almost surely, 2^1865138130 is an apocalyptic number.

1865138130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1865138130 is an abundant number, since it is smaller than the sum of its proper divisors (3214421550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1865138130 is a wasteful number, since it uses less digits than its factorization.

1865138130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147040 (or 147034 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 1865138130 is about 43187.2449920112. The cubic root of 1865138130 is about 1230.9403279373.

The spelling of 1865138130 in words is "one billion, eight hundred sixty-five million, one hundred thirty-eight thousand, one hundred thirty".