154422738 has 54 divisors (see below), whose sum is σ = 349982607. Its totient is φ = 49207200.

The previous prime is 154422731. The next prime is 154422803. The reversal of 154422738 is 837224451.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 149744169 + 4678569 = 12237^2 + 2163^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=8787.

It is a super-2 number, since 2×154422738² = 47692764022833288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (154422731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1528888 + ... + 1528988.

Almost surely, 2^154422738 is an apocalyptic number.

154422738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 154422738

154422738 is an abundant number, since it is smaller than the sum of its proper divisors (195559869).

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

154422738 is a wasteful number, since it uses less digits than its factorization.

154422738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 135 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 154422738 is about 12426.6945725724. The cubic root of 154422738 is about 536.5008522022.

The spelling of 154422738 in words is "one hundred fifty-four million, four hundred twenty-two thousand, seven hundred thirty-eight".