155490280 has 64 divisors (see below), whose sum is σ = 392014080. Its totient is φ = 55008000.

The previous prime is 155490271. The next prime is 155490289. The reversal of 155490280 is 82094551.

It is an interprime number because it is at equal distance from previous prime (155490271) and next prime (155490289).

It is not an unprimeable number, because it can be changed into a prime (155490289) 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 15 ways as a sum of consecutive naturals, for example, 11505 + ... + 21055.

It is an arithmetic number, because the mean of its divisors is an integer number (6125220).

Almost surely, 2^155490280 is an apocalyptic number.

155490280 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 155490280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196007040).

155490280 is an abundant number, since it is smaller than the sum of its proper divisors (236523800).

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

155490280 is a wasteful number, since it uses less digits than its factorization.

155490280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9610 (or 9606 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 155490280 is about 12469.5741707566. The cubic root of 155490280 is about 537.7343113991.

The spelling of 155490280 in words is "one hundred fifty-five million, four hundred ninety thousand, two hundred eighty".