1240400084 has 24 divisors (see below), whose sum is σ = 2706328128. Its totient is φ = 483272640.

The previous prime is 1240400081. The next prime is 1240400111. The reversal of 1240400084 is 4800040421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240400081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2013329 + ... + 2013944.

It is an arithmetic number, because the mean of its divisors is an integer number (112763672).

Almost surely, 2^1240400084 is an apocalyptic number.

1240400084 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1240400084 is an abundant number, since it is smaller than the sum of its proper divisors (1465928044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1240400084 is a wasteful number, since it uses less digits than its factorization.

1240400084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4027295 (or 4027293 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1240400084 is about 35219.3140762281. The cubic root of 1240400084 is about 1074.4526029388.

The spelling of 1240400084 in words is "one billion, two hundred forty million, four hundred thousand, eighty-four".