1400605540 has 24 divisors (see below), whose sum is σ = 2944263672. Its totient is φ = 559672320.

The previous prime is 1400605519. The next prime is 1400605541. The reversal of 1400605540 is 455060041.

It can be written as a sum of positive squares in 4 ways, for example, as 860600896 + 540004644 = 29336^2 + 23238^2 .

It is not an unprimeable number, because it can be changed into a prime (1400605541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15181 + ... + 55060.

It is an arithmetic number, because the mean of its divisors is an integer number (122677653).

Almost surely, 2^1400605540 is an apocalyptic number.

1400605540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1400605540 is an abundant number, since it is smaller than the sum of its proper divisors (1543658132).

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

1400605540 is a wasteful number, since it uses less digits than its factorization.

1400605540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71247 (or 71245 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1400605540 is about 37424.6648615589. The cubic root of 1400605540 is about 1118.8502071430.

Adding to 1400605540 its reverse (455060041), we get a palindrome (1855665581).

The spelling of 1400605540 in words is "one billion, four hundred million, six hundred five thousand, five hundred forty".