1400412440 has 64 divisors (see below), whose sum is σ = 3616176960. Its totient is φ = 478126080.

The previous prime is 1400412421. The next prime is 1400412463. The reversal of 1400412440 is 442140041.

It is a happy number.

It is a super-2 number, since 2×1400412440² = 3922310004213507200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 57104 + ... + 77856.

It is an arithmetic number, because the mean of its divisors is an integer number (56502765).

Almost surely, 2^1400412440 is an apocalyptic number.

1400412440 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 1400412440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808088480).

1400412440 is an abundant number, since it is smaller than the sum of its proper divisors (2215764520).

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

1400412440 is a wasteful number, since it uses less digits than its factorization.

1400412440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21012 (or 21008 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 1400412440 is about 37422.0849232108. The cubic root of 1400412440 is about 1118.7987865495.

Adding to 1400412440 its reverse (442140041), we get a palindrome (1842552481).

The spelling of 1400412440 in words is "one billion, four hundred million, four hundred twelve thousand, four hundred forty".