2186578040 has 16 divisors (see below), whose sum is σ = 4919800680. Its totient is φ = 874631200.

The previous prime is 2186578021. The next prime is 2186578049. The reversal of 2186578040 is 408756812.

It is a super-2 number, since 2×2186578040² = 9562247050020483200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2186578049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27332186 + ... + 27332265.

Almost surely, 2^2186578040 is an apocalyptic number.

2186578040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2186578040 is an abundant number, since it is smaller than the sum of its proper divisors (2733222640).

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

2186578040 is a wasteful number, since it uses less digits than its factorization.

2186578040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54664462 (or 54664458 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 2186578040 is about 46760.8601289583. The cubic root of 2186578040 is about 1297.9411275740.

The spelling of 2186578040 in words is "two billion, one hundred eighty-six million, five hundred seventy-eight thousand, forty".