155760640 has 192 divisors, whose sum is σ = 445798080. Its totient is φ = 51118080.

The previous prime is 155760601. The next prime is 155760641. The reversal of 155760640 is 46067551.

It is a happy number.

It is a super-2 number, since 2×155760640² = 48522753946419200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 155760596 and 155760605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155760641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2938854 + ... + 2938906.

It is an arithmetic number, because the mean of its divisors is an integer number (2321865).

Almost surely, 2^155760640 is an apocalyptic number.

155760640 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 155760640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222899040).

155760640 is an abundant number, since it is smaller than the sum of its proper divisors (290037440).

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

155760640 is an equidigital number, since it uses as much as digits as its factorization.

155760640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 155760640 is about 12480.4102496673. The cubic root of 155760640 is about 538.0457942528.

The spelling of 155760640 in words is "one hundred fifty-five million, seven hundred sixty thousand, six hundred forty".