1205640264 has 32 divisors (see below), whose sum is σ = 3095565120. Its totient is φ = 391018176.

The previous prime is 1205640263. The next prime is 1205640283. The reversal of 1205640264 is 4620465021.

It is not an unprimeable number, because it can be changed into a prime (1205640263) 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, 677964 + ... + 679739.

It is an arithmetic number, because the mean of its divisors is an integer number (96736410).

Almost surely, 2^1205640264 is an apocalyptic number.

It is an amenable number.

1205640264 is an abundant number, since it is smaller than the sum of its proper divisors (1889924856).

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

1205640264 is a wasteful number, since it uses less digits than its factorization.

1205640264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357749 (or 1357745 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 1205640264 is about 34722.3309125410. The cubic root of 1205640264 is about 1064.3208771788.

The spelling of 1205640264 in words is "one billion, two hundred five million, six hundred forty thousand, two hundred sixty-four".