1240923831 has 32 divisors (see below), whose sum is σ = 1966964736. Its totient is φ = 680940000.

The previous prime is 1240923829. The next prime is 1240923883. The reversal of 1240923831 is 1383290421.

It is not a de Polignac number, because 1240923831 - 2¹ = 1240923829 is a prime.

It is a super-2 number, since 2×1240923831² = 3079783908687433122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1240923792 and 1240923801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240923811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 78006 + ... + 92556.

It is an arithmetic number, because the mean of its divisors is an integer number (61467648).

Almost surely, 2^1240923831 is an apocalyptic number.

1240923831 is a deficient number, since it is larger than the sum of its proper divisors (726040905).

1240923831 is a wasteful number, since it uses less digits than its factorization.

1240923831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14723.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1240923831 is about 35226.7487997402. The cubic root of 1240923831 is about 1074.6038074169.

The spelling of 1240923831 in words is "one billion, two hundred forty million, nine hundred twenty-three thousand, eight hundred thirty-one".