155357440 has 108 divisors (see below), whose sum is σ = 433060236. Its totient is φ = 53243904.

The previous prime is 155357417. The next prime is 155357467. The reversal of 155357440 is 44753551.

It can be written as a sum of positive squares in 2 ways, for example, as 66846976 + 88510464 = 8176^2 + 9408^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 155357396 and 155357405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61482 + ... + 63958.

It is an arithmetic number, because the mean of its divisors is an integer number (4009817).

Almost surely, 2^155357440 is an apocalyptic number.

155357440 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 155357440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216530118).

155357440 is an abundant number, since it is smaller than the sum of its proper divisors (277702796).

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

155357440 is an equidigital number, since it uses as much as digits as its factorization.

155357440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512 (or 2491 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 155357440 is about 12464.2464673963. The cubic root of 155357440 is about 537.5811335972.

The spelling of 155357440 in words is "one hundred fifty-five million, three hundred fifty-seven thousand, four hundred forty".