120400263 has 20 divisors (see below), whose sum is σ = 180373248. Its totient is φ = 80036640.

The previous prime is 120400261. The next prime is 120400277. The reversal of 120400263 is 362004021.

It is a happy number.

120400263 is a `hidden beast` number, since 1 + 2 + 0 + 400 + 263 = 666.

It is not a de Polignac number, because 120400263 - 2¹ = 120400261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120400261) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29083 + ... + 32963.

Almost surely, 2^120400263 is an apocalyptic number.

120400263 is a deficient number, since it is larger than the sum of its proper divisors (59972985).

120400263 is an equidigital number, since it uses as much as digits as its factorization.

120400263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4276 (or 4267 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 120400263 is about 10972.7053637651. The cubic root of 120400263 is about 493.7902137198.

Adding to 120400263 its reverse (362004021), we get a palindrome (482404284).

The spelling of 120400263 in words is "one hundred twenty million, four hundred thousand, two hundred sixty-three".