70763220 has 270 divisors, whose sum is σ = 257520186. Its totient is φ = 16251840.

The previous prime is 70763213. The next prime is 70763263. The reversal of 70763220 is 2236707.

70763220 is a `hidden beast` number, since 7 + 0 + 7 + 632 + 20 = 666.

It can be written as a sum of positive squares in only one way, i.e., 56610576 + 14152644 = 7524^2 + 3762^2 .

It is a tau number, because it is divible by the number of its divisors (270).

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 89 ways as a sum of consecutive naturals, for example, 3724371 + ... + 3724389.

Almost surely, 2^70763220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70763220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128760093).

70763220 is an abundant number, since it is smaller than the sum of its proper divisors (186756966).

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

70763220 is a wasteful number, since it uses less digits than its factorization.

70763220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 27.

The square root of 70763220 is about 8412.0877313542. The cubic root of 70763220 is about 413.6209511041.

Adding to 70763220 its reverse (2236707), we get a palindrome (72999927).

It can be divided in two parts, 7076 and 3220, that added together give a triangular number (10296 = T₁₄₃).

The spelling of 70763220 in words is "seventy million, seven hundred sixty-three thousand, two hundred twenty".