153749840 has 20 divisors (see below), whose sum is σ = 357468564. Its totient is φ = 61499904.

The previous prime is 153749839. The next prime is 153749923. The reversal of 153749840 is 48947351.

153749840 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 49056016 + 104693824 = 7004^2 + 10232^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 960857 + ... + 961016.

Almost surely, 2^153749840 is an apocalyptic number.

153749840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153749840 is an abundant number, since it is smaller than the sum of its proper divisors (203718724).

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

153749840 is a wasteful number, since it uses less digits than its factorization.

153749840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921886 (or 1921880 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 153749840 is about 12399.5903158129. The cubic root of 153749840 is about 535.7204490127.

The spelling of 153749840 in words is "one hundred fifty-three million, seven hundred forty-nine thousand, eight hundred forty".