136721490 has 32 divisors (see below), whose sum is σ = 328720896. Its totient is φ = 36393600.

The previous prime is 136721483. The next prime is 136721491. The reversal of 136721490 is 94127631.

It is not an unprimeable number, because it can be changed into a prime (136721491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14239 + ... + 21821.

It is an arithmetic number, because the mean of its divisors is an integer number (10272528).

Almost surely, 2^136721490 is an apocalyptic number.

136721490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

136721490 is an abundant number, since it is smaller than the sum of its proper divisors (191999406).

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

136721490 is a wasteful number, since it uses less digits than its factorization.

136721490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8194.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 136721490 is about 11692.7965004100. The cubic root of 136721490 is about 515.1641039226.

The spelling of 136721490 in words is "one hundred thirty-six million, seven hundred twenty-one thousand, four hundred ninety".