136400220 has 96 divisors (see below), whose sum is σ = 462954240. Its totient is φ = 33065280.

The previous prime is 136400203. The next prime is 136400237. The reversal of 136400220 is 22004631.

It is a happy number.

136400220 is a `hidden beast` number, since 1 + 3 + 640 + 0 + 2 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (136400203) and next prime (136400237).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 136400193 and 136400202.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 5542 + ... + 17421.

It is an arithmetic number, because the mean of its divisors is an integer number (4822440).

Almost surely, 2^136400220 is an apocalyptic number.

136400220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136400220 is an abundant number, since it is smaller than the sum of its proper divisors (326554020).

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

136400220 is a wasteful number, since it uses less digits than its factorization.

136400220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22992 (or 22984 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 136400220 is about 11679.0504751028. The cubic root of 136400220 is about 514.7602742641.

Adding to 136400220 its reverse (22004631), we get a palindrome (158404851).

The spelling of 136400220 in words is "one hundred thirty-six million, four hundred thousand, two hundred twenty".