1400560640 has 88 divisors (see below), whose sum is σ = 3557554992. Its totient is φ = 527237120.

The previous prime is 1400560633. The next prime is 1400560649. The reversal of 1400560640 is 460650041.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400560649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78995 + ... + 95085.

Almost surely, 2^1400560640 is an apocalyptic number.

1400560640 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 1400560640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1778777496).

1400560640 is an abundant number, since it is smaller than the sum of its proper divisors (2156994352).

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

1400560640 is a wasteful number, since it uses less digits than its factorization.

1400560640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16133 (or 16115 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 1400560640 is about 37424.0649849799. The cubic root of 1400560640 is about 1118.8382511450.

The spelling of 1400560640 in words is "one billion, four hundred million, five hundred sixty thousand, six hundred forty".