154256640 has 216 divisors, whose sum is σ = 527106720. Its totient is φ = 38436864.

The previous prime is 154256633. The next prime is 154256647. The reversal of 154256640 is 46652451.

It is an interprime number because it is at equal distance from previous prime (154256633) and next prime (154256647).

It is a super-2 number, since 2×154256640² = 47590221968179200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (154256647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1109691 + ... + 1109829.

Almost surely, 2^154256640 is an apocalyptic number.

154256640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154256640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263553360).

154256640 is an abundant number, since it is smaller than the sum of its proper divisors (372850080).

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

154256640 is a wasteful number, since it uses less digits than its factorization.

154256640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 154256640 is about 12420.0096618320. The cubic root of 154256640 is about 536.3084287105.

The spelling of 154256640 in words is "one hundred fifty-four million, two hundred fifty-six thousand, six hundred forty".