136423240 has 16 divisors (see below), whose sum is σ = 306952380. Its totient is φ = 54569280.

The previous prime is 136423237. The next prime is 136423247. The reversal of 136423240 is 42324631.

It can be written as a sum of positive squares in 2 ways, for example, as 128459556 + 7963684 = 11334^2 + 2822^2 .

It is a super-2 number, since 2×136423240² = 37222600824195200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136423247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1705251 + ... + 1705330.

Almost surely, 2^136423240 is an apocalyptic number.

136423240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

136423240 is an abundant number, since it is smaller than the sum of its proper divisors (170529140).

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

136423240 is a wasteful number, since it uses less digits than its factorization.

136423240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410592 (or 3410588 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 136423240 is about 11680.0359588488. The cubic root of 136423240 is about 514.7892309988.

Adding to 136423240 its reverse (42324631), we get a palindrome (178747871).

The spelling of 136423240 in words is "one hundred thirty-six million, four hundred twenty-three thousand, two hundred forty".