136491290 has 64 divisors (see below), whose sum is σ = 274337280. Its totient is φ = 48576000.

The previous prime is 136491287. The next prime is 136491293. The reversal of 136491290 is 92194631.

It is an interprime number because it is at equal distance from previous prime (136491287) and next prime (136491293).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 136491290.

It is not an unprimeable number, because it can be changed into a prime (136491293) 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, 543665 + ... + 543915.

It is an arithmetic number, because the mean of its divisors is an integer number (4286520).

Almost surely, 2^136491290 is an apocalyptic number.

136491290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136491290 is an abundant number, since it is smaller than the sum of its proper divisors (137845990).

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

136491290 is a wasteful number, since it uses less digits than its factorization.

136491290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 136491290 is about 11682.9486860124. The cubic root of 136491290 is about 514.8748116864.

The spelling of 136491290 in words is "one hundred thirty-six million, four hundred ninety-one thousand, two hundred ninety".