1400540240 has 120 divisors (see below), whose sum is σ = 3774213792. Its totient is φ = 479242240.

The previous prime is 1400540209. The next prime is 1400540327. The reversal of 1400540240 is 420450041.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251567 + ... + 257073.

Almost surely, 2^1400540240 is an apocalyptic number.

1400540240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1400540240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1887106896).

1400540240 is an abundant number, since it is smaller than the sum of its proper divisors (2373673552).

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

1400540240 is a wasteful number, since it uses less digits than its factorization.

1400540240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5565 (or 5542 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 1400540240 is about 37423.7924320879. The cubic root of 1400540240 is about 1118.8328189368.

Adding to 1400540240 its reverse (420450041), we get a palindrome (1820990281).

It can be divided in two parts, 14005 and 40240, that added together give a palindrome (54245).

The spelling of 1400540240 in words is "one billion, four hundred million, five hundred forty thousand, two hundred forty".