705155220 has 240 divisors, whose sum is σ = 2758428288. Its totient is φ = 146499840.

The previous prime is 705155219. The next prime is 705155239. The reversal of 705155220 is 22551507.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 121914 + ... + 127566.

Almost surely, 2^705155220 is an apocalyptic number.

705155220 is a gapful number since it is divisible by the number (70) 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 705155220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1379214144).

705155220 is an abundant number, since it is smaller than the sum of its proper divisors (2053273068).

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

705155220 is a wasteful number, since it uses less digits than its factorization.

705155220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5692 (or 5681 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 705155220 is about 26554.7588955351. The cubic root of 705155220 is about 890.0783586271.

The spelling of 705155220 in words is "seven hundred five million, one hundred fifty-five thousand, two hundred twenty".