1400366440 has 64 divisors (see below), whose sum is σ = 3441528000. Its totient is φ = 508592640.

The previous prime is 1400366437. The next prime is 1400366453. The reversal of 1400366440 is 446630041.

It is a happy number.

It is a super-2 number, since 2×1400366440² = 3922052332556547200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1400366399 and 1400366408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495351 + ... + 498169.

It is an arithmetic number, because the mean of its divisors is an integer number (53773875).

Almost surely, 2^1400366440 is an apocalyptic number.

1400366440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400366440 is an abundant number, since it is smaller than the sum of its proper divisors (2041161560).

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

1400366440 is a wasteful number, since it uses less digits than its factorization.

1400366440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970 (or 3966 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 1400366440 is about 37421.4703078326. The cubic root of 1400366440 is about 1118.7865365137.

Adding to 1400366440 its reverse (446630041), we get a palindrome (1846996481).

The spelling of 1400366440 in words is "one billion, four hundred million, three hundred sixty-six thousand, four hundred forty".