155768280 has 128 divisors (see below), whose sum is σ = 512049600. Its totient is φ = 37732352.

The previous prime is 155768279. The next prime is 155768281. The reversal of 155768280 is 82867551.

It is an interprime number because it is at equal distance from previous prime (155768279) and next prime (155768281).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155768281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57844 + ... + 60476.

Almost surely, 2^155768280 is an apocalyptic number.

155768280 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 155768280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256024800).

155768280 is an abundant number, since it is smaller than the sum of its proper divisors (356281320).

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

155768280 is a wasteful number, since it uses less digits than its factorization.

155768280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2693 (or 2689 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 42.

The square root of 155768280 is about 12480.7163255961. The cubic root of 155768280 is about 538.0545910894.

The spelling of 155768280 in words is "one hundred fifty-five million, seven hundred sixty-eight thousand, two hundred eighty".