155480640 has 224 divisors, whose sum is σ = 597798144. Its totient is φ = 33423360.

The previous prime is 155480617. The next prime is 155480659. The reversal of 155480640 is 46084551.

It is a tau number, because it is divible by the number of its divisors (224).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113560 + ... + 114920.

Almost surely, 2^155480640 is an apocalyptic number.

155480640 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 155480640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298899072).

155480640 is an abundant number, since it is smaller than the sum of its proper divisors (442317504).

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

155480640 is a wasteful number, since it uses less digits than its factorization.

155480640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405 (or 1395 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 155480640 is about 12469.1876238992. The cubic root of 155480640 is about 537.7231984517.

The spelling of 155480640 in words is "one hundred fifty-five million, four hundred eighty thousand, six hundred forty".