1205970840 has 48 divisors (see below), whose sum is σ = 3919406400. Its totient is φ = 321592128.

The previous prime is 1205970839. The next prime is 1205970841. The reversal of 1205970840 is 480795021.

1205970840 is a `hidden beast` number, since 1 + 20 + 597 + 0 + 8 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (1205970839) and next prime (1205970841).

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 = 1205970795 and 1205970804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205970841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1674600 + ... + 1675319.

It is an arithmetic number, because the mean of its divisors is an integer number (81654300).

Almost surely, 2^1205970840 is an apocalyptic number.

1205970840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205970840 is an abundant number, since it is smaller than the sum of its proper divisors (2713435560).

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

1205970840 is a wasteful number, since it uses less digits than its factorization.

1205970840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349936 (or 3349929 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 1205970840 is about 34727.0908657780. The cubic root of 1205970840 is about 1064.4181441101.

The spelling of 1205970840 in words is "one billion, two hundred five million, nine hundred seventy thousand, eight hundred forty".