154136640 has 112 divisors (see below), whose sum is σ = 559320192. Its totient is φ = 35229696.

The previous prime is 154136629. The next prime is 154136659. The reversal of 154136640 is 46631451.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 154136598 and 154136607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4749 + ... + 18188.

Almost surely, 2^154136640 is an apocalyptic number.

154136640 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 154136640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279660096).

154136640 is an abundant number, since it is smaller than the sum of its proper divisors (405183552).

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

154136640 is a wasteful number, since it uses less digits than its factorization.

154136640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22964 (or 22954 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 154136640 is about 12415.1778078286. The cubic root of 154136640 is about 536.1693235003.

The spelling of 154136640 in words is "one hundred fifty-four million, one hundred thirty-six thousand, six hundred forty".