240400431 has 24 divisors (see below), whose sum is σ = 352594944. Its totient is φ = 157817040.

The previous prime is 240400429. The next prime is 240400463. The reversal of 240400431 is 134004042.

240400431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 240400431 - 2¹ = 240400429 is a prime.

It is a super-2 number, since 2×240400431² = 115584734449971522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240400471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 183280 + ... + 184586.

It is an arithmetic number, because the mean of its divisors is an integer number (14691456).

Almost surely, 2^240400431 is an apocalyptic number.

240400431 is a deficient number, since it is larger than the sum of its proper divisors (112194513).

240400431 is a wasteful number, since it uses less digits than its factorization.

240400431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1608 counting only the distinct ones).

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

The square root of 240400431 is about 15504.8518535328. The cubic root of 240400431 is about 621.7919292117.

Adding to 240400431 its reverse (134004042), we get a palindrome (374404473).

The spelling of 240400431 in words is "two hundred forty million, four hundred thousand, four hundred thirty-one".