155638460 has 48 divisors (see below), whose sum is σ = 340593120. Its totient is φ = 59688960.

The previous prime is 155638433. The next prime is 155638477. The reversal of 155638460 is 64836551.

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, 46772 + ... + 49988.

It is an arithmetic number, because the mean of its divisors is an integer number (7095690).

Almost surely, 2^155638460 is an apocalyptic number.

155638460 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 155638460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170296560).

155638460 is an abundant number, since it is smaller than the sum of its proper divisors (184954660).

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

155638460 is a wasteful number, since it uses less digits than its factorization.

155638460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326 (or 3324 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 155638460 is about 12475.5144182515. The cubic root of 155638460 is about 537.9050748532.

The spelling of 155638460 in words is "one hundred fifty-five million, six hundred thirty-eight thousand, four hundred sixty".