153445440 has 56 divisors (see below), whose sum is σ = 487192320. Its totient is φ = 40918528.

The previous prime is 153445427. The next prime is 153445447. The reversal of 153445440 is 44544351.

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 = 153445398 and 153445407.

It is not an unprimeable number, because it can be changed into a prime (153445447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78960 + ... + 80879.

Almost surely, 2^153445440 is an apocalyptic number.

153445440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153445440 is an abundant number, since it is smaller than the sum of its proper divisors (333746880).

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

153445440 is a wasteful number, since it uses less digits than its factorization.

153445440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159859 (or 159849 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 153445440 is about 12387.3096352679. The cubic root of 153445440 is about 535.3666686058.

Adding to 153445440 its reverse (44544351), we get a palindrome (197989791).

The spelling of 153445440 in words is "one hundred fifty-three million, four hundred forty-five thousand, four hundred forty".