1400440140 has 72 divisors (see below), whose sum is σ = 4634190288. Its totient is φ = 339500160.

The previous prime is 1400440109. The next prime is 1400440141. The reversal of 1400440140 is 410440041.

It is a super-2 number, since 2×1400440140² = 3922465171446439200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1400440141) 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, 351667 + ... + 355626.

It is an arithmetic number, because the mean of its divisors is an integer number (64363754).

Almost surely, 2^1400440140 is an apocalyptic number.

1400440140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400440140 is an abundant number, since it is smaller than the sum of its proper divisors (3233750148).

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

1400440140 is a wasteful number, since it uses less digits than its factorization.

1400440140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707319 (or 707314 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1400440140 is about 37422.4550236887. The cubic root of 1400440140 is about 1118.8061630721.

Adding to 1400440140 its reverse (410440041), we get a palindrome (1810880181).

Subtracting from 1400440140 its reverse (410440041), we obtain a palindrome (990000099).

The spelling of 1400440140 in words is "one billion, four hundred million, four hundred forty thousand, one hundred forty".