1206491940 has 36 divisors (see below), whose sum is σ = 3659692764. Its totient is φ = 321731136.

The previous prime is 1206491929. The next prime is 1206491983. The reversal of 1206491940 is 491946021.

It is a happy number.

1206491940 is a `hidden beast` number, since 1 + 2 + 0 + 649 + 1 + 9 + 4 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 606045924 + 600446016 = 24618^2 + 24504^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1206491895 and 1206491904.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3351187 + ... + 3351546.

Almost surely, 2^1206491940 is an apocalyptic number.

1206491940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1206491940 is an abundant number, since it is smaller than the sum of its proper divisors (2453200824).

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

1206491940 is a wasteful number, since it uses less digits than its factorization.

1206491940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6702748 (or 6702743 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1206491940 is about 34734.5928434464. The cubic root of 1206491940 is about 1064.5714337267.

The spelling of 1206491940 in words is "one billion, two hundred six million, four hundred ninety-one thousand, nine hundred forty".