1206889620 has 24 divisors (see below), whose sum is σ = 3379291104. Its totient is φ = 321837216.

The previous prime is 1206889609. The next prime is 1206889627. The reversal of 1206889620 is 269886021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206889627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10057354 + ... + 10057473.

It is an arithmetic number, because the mean of its divisors is an integer number (140803796).

Almost surely, 2^1206889620 is an apocalyptic number.

1206889620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1206889620 is an abundant number, since it is smaller than the sum of its proper divisors (2172401484).

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

1206889620 is a wasteful number, since it uses less digits than its factorization.

1206889620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20114839 (or 20114837 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1206889620 is about 34740.3169242884. The cubic root of 1206889620 is about 1064.6883877504.

The spelling of 1206889620 in words is "one billion, two hundred six million, eight hundred eighty-nine thousand, six hundred twenty".