1240402023 has 72 divisors (see below), whose sum is σ = 2253766320. Its totient is φ = 653184000.

The previous prime is 1240401979. The next prime is 1240402073. The reversal of 1240402023 is 3202040421.

1240402023 is a `hidden beast` number, since 1 + 240 + 402 + 0 + 23 = 666.

1240402023 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1240402023 - 2¹² = 1240397927 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1240401987 and 1240402005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240402073) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 308023 + ... + 312023.

It is an arithmetic number, because the mean of its divisors is an integer number (31302310).

Almost surely, 2^1240402023 is an apocalyptic number.

1240402023 is a deficient number, since it is larger than the sum of its proper divisors (1013364297).

1240402023 is a wasteful number, since it uses less digits than its factorization.

1240402023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4077 (or 4067 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1240402023 is about 35219.3416037268. The cubic root of 1240402023 is about 1074.4531628019.

Adding to 1240402023 its reverse (3202040421), we get a palindrome (4442442444).

The spelling of 1240402023 in words is "one billion, two hundred forty million, four hundred two thousand, twenty-three".