1400531840 has 32 divisors (see below), whose sum is σ = 3348147960. Its totient is φ = 560212480.

The previous prime is 1400531827. The next prime is 1400531843. The reversal of 1400531840 is 481350041.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×1400531840² = 3922978869707571200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400531843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093526 + ... + 1094805.

Almost surely, 2^1400531840 is an apocalyptic number.

1400531840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400531840 is an abundant number, since it is smaller than the sum of its proper divisors (1947616120).

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

1400531840 is an equidigital number, since it uses as much as digits as its factorization.

1400531840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188350 (or 2188338 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 1400531840 is about 37423.6802038495. The cubic root of 1400531840 is about 1118.8305821298.

Adding to 1400531840 its reverse (481350041), we get a palindrome (1881881881).

The spelling of 1400531840 in words is "one billion, four hundred million, five hundred thirty-one thousand, eight hundred forty".