1240213646 has 16 divisors (see below), whose sum is σ = 2144898144. Its totient is φ = 526815744.

The previous prime is 1240213591. The next prime is 1240213661. The reversal of 1240213646 is 6463120421.

It is a super-2 number, since 2×1240213646² = 3076259775449226632, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390395 + ... + 393558.

It is an arithmetic number, because the mean of its divisors is an integer number (134056134).

Almost surely, 2^1240213646 is an apocalyptic number.

1240213646 is a deficient number, since it is larger than the sum of its proper divisors (904684498).

1240213646 is a wasteful number, since it uses less digits than its factorization.

1240213646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784075.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 1240213646 is about 35216.6671620129. The cubic root of 1240213646 is about 1074.3987684720.

The spelling of 1240213646 in words is "one billion, two hundred forty million, two hundred thirteen thousand, six hundred forty-six".