153238440 has 32 divisors (see below), whose sum is σ = 459715680. Its totient is φ = 40863552.

The previous prime is 153238411. The next prime is 153238441. The reversal of 153238440 is 44832351.

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 = 153238398 and 153238407.

It is not an unprimeable number, because it can be changed into a prime (153238441) 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, 638374 + ... + 638613.

It is an arithmetic number, because the mean of its divisors is an integer number (14366115).

Almost surely, 2^153238440 is an apocalyptic number.

153238440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

153238440 is an abundant number, since it is smaller than the sum of its proper divisors (306477240).

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

153238440 is a wasteful number, since it uses less digits than its factorization.

153238440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277001 (or 1276997 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 153238440 is about 12378.9514903323. The cubic root of 153238440 is about 535.1258212819.

The spelling of 153238440 in words is "one hundred fifty-three million, two hundred thirty-eight thousand, four hundred forty".