155267280 has 360 divisors, whose sum is σ = 632896992. Its totient is φ = 35271936.

The previous prime is 155267269. The next prime is 155267303. The reversal of 155267280 is 82762551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (360).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 952479 + ... + 952641.

Almost surely, 2^155267280 is an apocalyptic number.

155267280 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 155267280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316448496).

155267280 is an abundant number, since it is smaller than the sum of its proper divisors (477629712).

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

155267280 is a wasteful number, since it uses less digits than its factorization.

155267280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 180 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 155267280 is about 12460.6291975967. The cubic root of 155267280 is about 537.4771203529.

The spelling of 155267280 in words is "one hundred fifty-five million, two hundred sixty-seven thousand, two hundred eighty".