1220200040 has 64 divisors (see below), whose sum is σ = 2778235200. Its totient is φ = 482291712.

The previous prime is 1220200039. The next prime is 1220200067. The reversal of 1220200040 is 400020221.

It is a junction number, because it is equal to n+sod(n) for n = 1220199994 and 1220200030.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1381439 + ... + 1382321.

It is an arithmetic number, because the mean of its divisors is an integer number (43409925).

Almost surely, 2^1220200040 is an apocalyptic number.

1220200040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220200040 is an abundant number, since it is smaller than the sum of its proper divisors (1558035160).

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

1220200040 is a wasteful number, since it uses less digits than its factorization.

1220200040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1266 (or 1262 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 1220200040 is about 34931.3618400428. The cubic root of 1220200040 is about 1068.5881282379.

Adding to 1220200040 its reverse (400020221), we get a palindrome (1620220261).

The spelling of 1220200040 in words is "one billion, two hundred twenty million, two hundred thousand, forty".